EP2590655B1 - Composés et procédés pour l'inhibition du transport de phosphate - Google Patents
Composés et procédés pour l'inhibition du transport de phosphate Download PDFInfo
- Publication number
- EP2590655B1 EP2590655B1 EP11804369.4A EP11804369A EP2590655B1 EP 2590655 B1 EP2590655 B1 EP 2590655B1 EP 11804369 A EP11804369 A EP 11804369A EP 2590655 B1 EP2590655 B1 EP 2590655B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- optionally substituted
- compound
- equiv
- mmol
- phenyl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 150000001875 compounds Chemical class 0.000 title claims description 217
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title claims description 130
- 229910019142 PO4 Inorganic materials 0.000 title claims description 125
- 239000010452 phosphate Substances 0.000 title claims description 123
- 230000002401 inhibitory effect Effects 0.000 title claims description 20
- 238000000034 method Methods 0.000 title description 62
- -1 trifluoromethylphenyl Chemical group 0.000 claims description 86
- 239000003112 inhibitor Substances 0.000 claims description 39
- 239000008194 pharmaceutical composition Substances 0.000 claims description 39
- 210000002966 serum Anatomy 0.000 claims description 36
- 229910052698 phosphorus Inorganic materials 0.000 claims description 35
- 239000011574 phosphorus Substances 0.000 claims description 35
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 34
- 230000000694 effects Effects 0.000 claims description 29
- 150000003839 salts Chemical class 0.000 claims description 28
- 125000004169 (C1-C6) alkyl group Chemical group 0.000 claims description 27
- 239000000651 prodrug Substances 0.000 claims description 26
- 229940002612 prodrug Drugs 0.000 claims description 26
- 239000001257 hydrogen Substances 0.000 claims description 25
- 229910052739 hydrogen Inorganic materials 0.000 claims description 25
- 125000000623 heterocyclic group Chemical group 0.000 claims description 24
- 239000011734 sodium Substances 0.000 claims description 24
- 125000001072 heteroaryl group Chemical group 0.000 claims description 23
- 125000003107 substituted aryl group Chemical group 0.000 claims description 22
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 21
- 208000020832 chronic kidney disease Diseases 0.000 claims description 19
- 201000005991 hyperphosphatemia Diseases 0.000 claims description 18
- 241000124008 Mammalia Species 0.000 claims description 15
- 230000001404 mediated effect Effects 0.000 claims description 15
- 229930003316 Vitamin D Natural products 0.000 claims description 13
- QYSXJUFSXHHAJI-XFEUOLMDSA-N Vitamin D3 Natural products C1(/[C@@H]2CC[C@@H]([C@]2(CCC1)C)[C@H](C)CCCC(C)C)=C/C=C1\C[C@@H](O)CCC1=C QYSXJUFSXHHAJI-XFEUOLMDSA-N 0.000 claims description 13
- 125000003118 aryl group Chemical group 0.000 claims description 13
- 235000019166 vitamin D Nutrition 0.000 claims description 13
- 239000011710 vitamin D Substances 0.000 claims description 13
- 150000003710 vitamin D derivatives Chemical class 0.000 claims description 13
- 229940046008 vitamin d Drugs 0.000 claims description 13
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 12
- 239000013543 active substance Substances 0.000 claims description 12
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 12
- 229910052708 sodium Inorganic materials 0.000 claims description 12
- 239000002694 phosphate binding agent Substances 0.000 claims description 11
- 125000003545 alkoxy group Chemical group 0.000 claims description 10
- 125000003282 alkyl amino group Chemical group 0.000 claims description 10
- ZNSIZMQNQCNRBW-UHFFFAOYSA-N sevelamer Chemical group NCC=C.ClCC1CO1 ZNSIZMQNQCNRBW-UHFFFAOYSA-N 0.000 claims description 10
- 239000003085 diluting agent Substances 0.000 claims description 9
- 239000000546 pharmaceutical excipient Substances 0.000 claims description 9
- 125000004001 thioalkyl group Chemical group 0.000 claims description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- VSGNNIFQASZAOI-UHFFFAOYSA-L calcium acetate Chemical compound [Ca+2].CC([O-])=O.CC([O-])=O VSGNNIFQASZAOI-UHFFFAOYSA-L 0.000 claims description 8
- 125000005843 halogen group Chemical group 0.000 claims description 8
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- 102100024802 Fibroblast growth factor 23 Human genes 0.000 claims description 7
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- 239000011612 calcitriol Substances 0.000 claims description 7
- GMRQFYUYWCNGIN-NKMMMXOESA-N calcitriol Chemical compound C1(/[C@@H]2CC[C@@H]([C@]2(CCC1)C)[C@@H](CCCC(C)(C)O)C)=C\C=C1\C[C@@H](O)C[C@H](O)C1=C GMRQFYUYWCNGIN-NKMMMXOESA-N 0.000 claims description 7
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- 125000000753 cycloalkyl group Chemical group 0.000 claims description 7
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- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 4
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- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
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- 229940099065 fosrenol Drugs 0.000 claims description 4
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 4
- 229940095591 phoslo Drugs 0.000 claims description 4
- 125000004076 pyridyl group Chemical group 0.000 claims description 4
- DEMLYXMVPJAVFU-UHFFFAOYSA-N 2-(chloromethyl)oxirane;2-methyl-1h-imidazole Chemical compound ClCC1CO1.CC1=NC=CN1 DEMLYXMVPJAVFU-UHFFFAOYSA-N 0.000 claims description 3
- 206010048554 Endothelial dysfunction Diseases 0.000 claims description 3
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 claims description 3
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- 125000001309 chloro group Chemical group Cl* 0.000 claims description 3
- 229960000413 doxercalciferol Drugs 0.000 claims description 3
- HKXBNHCUPKIYDM-CGMHZMFXSA-N doxercalciferol Chemical compound C1(/[C@@H]2CC[C@@H]([C@]2(CCC1)C)[C@H](C)/C=C/[C@H](C)C(C)C)=C\C=C1\C[C@@H](O)C[C@H](O)C1=C HKXBNHCUPKIYDM-CGMHZMFXSA-N 0.000 claims description 3
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- 229950008705 fermagate Drugs 0.000 claims description 3
- 229960000987 paricalcitol Drugs 0.000 claims description 3
- BPKAHTKRCLCHEA-UBFJEZKGSA-N paricalcitol Chemical compound C1(/[C@@H]2CC[C@@H]([C@]2(CCC1)C)[C@@H](\C=C\[C@H](C)C(C)(C)O)C)=C\C=C1C[C@@H](O)C[C@H](O)C1 BPKAHTKRCLCHEA-UBFJEZKGSA-N 0.000 claims description 3
- 229940020428 renagel Drugs 0.000 claims description 3
- 125000005415 substituted alkoxy group Chemical group 0.000 claims description 3
- VESOWWBEYMMDFG-UHFFFAOYSA-A tetramagnesium;iron(3+);carbonate;dodecahydroxide;tetrahydrate Chemical compound O.O.O.O.[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Fe+3].[Fe+3].[O-]C([O-])=O VESOWWBEYMMDFG-UHFFFAOYSA-A 0.000 claims description 3
- MECHNRXZTMCUDQ-RKHKHRCZSA-N vitamin D2 Chemical group C1(/[C@@H]2CC[C@@H]([C@]2(CCC1)C)[C@H](C)/C=C/[C@H](C)C(C)C)=C\C=C1\C[C@@H](O)CCC1=C MECHNRXZTMCUDQ-RKHKHRCZSA-N 0.000 claims description 3
- QYSXJUFSXHHAJI-YRZJJWOYSA-N vitamin D3 Chemical compound C1(/[C@@H]2CC[C@@H]([C@]2(CCC1)C)[C@H](C)CCCC(C)C)=C\C=C1\C[C@@H](O)CCC1=C QYSXJUFSXHHAJI-YRZJJWOYSA-N 0.000 claims description 3
- 125000001664 diethylamino group Chemical group [H]C([H])([H])C([H])([H])N(*)C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 125000000587 piperidin-1-yl group Chemical group [H]C1([H])N(*)C([H])([H])C([H])([H])C([H])([H])C1([H])[H] 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 240
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 220
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 159
- 239000000203 mixture Substances 0.000 description 142
- 235000021317 phosphate Nutrition 0.000 description 117
- 239000007787 solid Substances 0.000 description 93
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 72
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 56
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- 230000032258 transport Effects 0.000 description 49
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 39
- 239000012267 brine Substances 0.000 description 39
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 39
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- OKKJLVBELUTLKV-MZCSYVLQSA-N Deuterated methanol Chemical compound [2H]OC([2H])([2H])[2H] OKKJLVBELUTLKV-MZCSYVLQSA-N 0.000 description 30
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- MYPYJXKWCTUITO-LYRMYLQWSA-N vancomycin Chemical compound O([C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=C2C=C3C=C1OC1=CC=C(C=C1Cl)[C@@H](O)[C@H](C(N[C@@H](CC(N)=O)C(=O)N[C@H]3C(=O)N[C@H]1C(=O)N[C@H](C(N[C@@H](C3=CC(O)=CC(O)=C3C=3C(O)=CC=C1C=3)C(O)=O)=O)[C@H](O)C1=CC=C(C(=C1)Cl)O2)=O)NC(=O)[C@@H](CC(C)C)NC)[C@H]1C[C@](C)(N)[C@H](O)[C@H](C)O1 MYPYJXKWCTUITO-LYRMYLQWSA-N 0.000 description 1
- 229960003165 vancomycin Drugs 0.000 description 1
- MYPYJXKWCTUITO-UHFFFAOYSA-N vancomycin Natural products O1C(C(=C2)Cl)=CC=C2C(O)C(C(NC(C2=CC(O)=CC(O)=C2C=2C(O)=CC=C3C=2)C(O)=O)=O)NC(=O)C3NC(=O)C2NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(CC(C)C)NC)C(O)C(C=C3Cl)=CC=C3OC3=CC2=CC1=C3OC1OC(CO)C(O)C(O)C1OC1CC(C)(N)C(O)C(C)O1 MYPYJXKWCTUITO-UHFFFAOYSA-N 0.000 description 1
- 210000005166 vasculature Anatomy 0.000 description 1
- 239000003071 vasodilator agent Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 239000008215 water for injection Substances 0.000 description 1
Classifications
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
- A61K31/5375—1,4-Oxazines, e.g. morpholine
- A61K31/5377—1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
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- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
- A61K31/415—1,2-Diazoles
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- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
- A61K31/445—Non condensed piperidines, e.g. piperocaine
- A61K31/4523—Non condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems
- A61K31/454—Non condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems containing a five-membered ring with nitrogen as a ring hetero atom, e.g. pimozide, domperidone
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- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
- A61K31/445—Non condensed piperidines, e.g. piperocaine
- A61K31/4523—Non condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems
- A61K31/4545—Non condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems containing a six-membered ring with nitrogen as a ring hetero atom, e.g. pipamperone, anabasine
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- A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
- A61K31/4965—Non-condensed pyrazines
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- A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
- A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
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- A61K31/59—Compounds containing 9, 10- seco- cyclopenta[a]hydrophenanthrene ring systems
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- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
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- A61P13/12—Drugs for disorders of the urinary system of the kidneys
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- A61P7/00—Drugs for disorders of the blood or the extracellular fluid
- A61P7/08—Plasma substitutes; Perfusion solutions; Dialytics or haemodialytics; Drugs for electrolytic or acid-base disorders, e.g. hypovolemic shock
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
- C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D211/68—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
- C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
- C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D231/14—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D231/38—Nitrogen atoms
- C07D231/40—Acylated on said nitrogen atom
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D233/54—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members
- C07D233/66—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D233/88—Nitrogen atoms, e.g. allantoin
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D249/00—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms
- C07D249/02—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms not condensed with other rings
- C07D249/08—1,2,4-Triazoles; Hydrogenated 1,2,4-triazoles
- C07D249/10—1,2,4-Triazoles; Hydrogenated 1,2,4-triazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D249/14—Nitrogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D255/00—Heterocyclic compounds containing rings having three nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D249/00 - C07D253/00
- C07D255/02—Heterocyclic compounds containing rings having three nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D249/00 - C07D253/00 not condensed with other rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
- C07D277/20—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D277/32—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D277/38—Nitrogen atoms
- C07D277/44—Acylated amino or imino radicals
- C07D277/46—Acylated amino or imino radicals by carboxylic acids, or sulfur or nitrogen analogues thereof
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D285/00—Heterocyclic compounds containing rings having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by groups C07D275/00 - C07D283/00
- C07D285/01—Five-membered rings
- C07D285/02—Thiadiazoles; Hydrogenated thiadiazoles
- C07D285/04—Thiadiazoles; Hydrogenated thiadiazoles not condensed with other rings
- C07D285/12—1,3,4-Thiadiazoles; Hydrogenated 1,3,4-thiadiazoles
- C07D285/125—1,3,4-Thiadiazoles; Hydrogenated 1,3,4-thiadiazoles with oxygen, sulfur or nitrogen atoms, directly attached to ring carbon atoms, the nitrogen atoms not forming part of a nitro radical
- C07D285/135—Nitrogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
- C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
Definitions
- the present invention is directed to novel phosphate transport inhibitors, more specifically, inhibitors of intestinal apical membrane Na/phosphate co-transport, and methods for their preparation and use as therapeutic or prophylactic agents.
- ESRD end-stage renal disease
- High-normal serum phosphorus levels have been associated with cardiovascular events and mortality among individuals who have chronic kidney disease (CKD) and among those who have normal kidney function (see, e.g., Joy, M.S., P.C. Karagiannis and F.W. Peyerl, Outcomes of Secondary Hyperparathyroidism in Chronic Kidney Disease and the Direct Costs of Treatment, J. Manag. Care Pharm., 13(5):397-411 (2007 ))
- the progression of kidney disease can be slowed by reducing phosphate retention.
- therapy to reduce phosphate retention is beneficial.
- calcium salts have been widely used to bind intestinal phosphate and prevent its absorption.
- Different types of calcium salts including calcium carbonate, acetate, citrate, alginate, and ketoacid salts have been utilized for phosphate binding.
- a problem with all of these therapeutics is the hypercalcemia, which often results from absorption of high amounts of ingested calcium. Hypercalcemia causes serious side effects such as cardiac arrhythmias, renal failure, and skin and vascular calcification. Frequent monitoring of serum calcium levels is required during therapy with calcium-based phosphate binders.
- An alternative approach to the prevention of phosphate absorption from the intestine in patients with elevated phosphate serum levels is through inhibition of the intestinal transport system which mediates phosphate uptake in the intestine. It is understood that phosphate absorption in the upper intestine is mediated at least in part by a carrier-mediated mechanism which couples the absorption of phosphate to that of sodium. Inhibition of intestinal phosphate transport will reduce body phosphorus overload. In patients with advanced kidney disease (e.g. stage 4 and 5), the body phosphorus overload manifests itself by serum phosphate concentration above normal levels, i.e. hyperphosphatemia. Hyperphosphatemia is directly related to mortality and morbidity. Inhibition of intestinal phosphate transport will reduce serum phosphate concentration and therefore improve outcome in those patients.
- the present invention is directed to compounds having activity as phosphate transport inhibitors, more specifically, inhibitors of intestinal apical membrane Na/phosphate co-transport, including stereoisomers, pharmaceutically acceptable salts and prodrugs thereof, and the use of such compounds to inhibit sodium-mediated phosphate uptake and to thereby treat any of a variety of conditions or diseases in which modulation of sodium-mediated phosphate uptake provides a therapeutic benefit.
- phosphate transport inhibitors more specifically, inhibitors of intestinal apical membrane Na/phosphate co-transport, including stereoisomers, pharmaceutically acceptable salts and prodrugs thereof
- compounds having the following structure (I) are provided: or a stereoisomer, prodrug or pharmaceutically acceptable salt thereof, wherein:
- a pharmaceutical composition comprising a compound having structure (I), or a stereoisomer, pharmaceutically acceptable salt or prodrug thereof, and a pharmaceutically acceptable carrier, diluent or excipient.
- the pharmaceutical composition further comprises one or more additional biologically active agents.
- the additional biologically active agent is selected from vitamin D 2 (ergocalciferol), vitamin D 3 (cholecalciferol), active vitamin D (calcitriol) and active vitamin D analogs ( e.g . doxercalciferol, paricalcitol).
- the additional biologically active agent is a phosphate binder, and the compound does not interfere with the phosphate binder.
- the phosphate binder is selected from the group consisting of Renvela, Renagel, Fosrenol, calcium carbonate, calcium acetate (e.g. Phoslo), MCI-196, ZerenexTM, Fermagate, APS1585, SBR-759 and PA-21.
- the compound is substantially active as an inhibitor of Na/phosphate co-transport and the Na/phosphate co-transport is mediated by NaPi2b.
- Also disclosed is a method of inhibiting phosphate transport in a mammal comprising administering to the mammal an effective amount of a compound having structure (I), or a stereoisomer, pharmaceutically acceptable salt or prodrug thereof, or a pharmaceutical composition comprising such compound.
- the method inhibits sodium-mediated phosphate uptake.
- the method is selected from the group consisting of: (a) a method for treating hyperphosphatemia; (b) a method for treating a renal disease; (c) a method for delaying time to dialysis; (d) a method for attenuating intima localized vascular calcification; (e) a method for reducing the hyperphosphatemic effect of active vitamin D; (f) a method for reducing FGF23 levels; (g) a method for attenuating hyperparathyroidism; (h) a method for improving endothelial dysfunction induced by postprandial serum phosphate; (i) a method for reducing urinary phosphorous; (j) a method for normalizing serum phosphorus levels; (k) a method for treating proteinura; and (l) a method for reducing serum PTH and phosphate concentrations or levels.
- the renal disease is chronic kidney disease or end stage renal disease.
- a method of treating hyperphosphatemia in a mammal in need thereof comprising administering to the mammal an effective amount of a compound having structure (I), or a stereoisomer, pharmaceutically acceptable salt or prodrug thereof, or a pharmaceutical composition comprising such compound.
- Amino refers to the -NH 2 radical.
- Niro refers to the -NO 2 radical.
- Alkyl refers to a straight or branched hydrocarbon chain radical consisting solely of carbon and hydrogen atoms, which is saturated or unsaturated (i.e., contains one or more double and/or triple bonds), having from one to twelve carbon atoms (C 1-12 alkyl), preferably one to eight carbon atoms (C 1 -C 8 alkyl) or one to six carbon atoms (C 1 -C 6 alkyl), and which is attached to the rest of the molecule by a single bond, e.g., methyl, ethyl, n-propyl, 1-methylethyl ( iso -propyl), n -butyl, n -pentyl, 1,1-dimethylethyl ( t -butyl), 3-methylhexyl, 2-methylhexyl, ethenyl, prop-1-enyl, but-1-enyl, pent-1-enyl, penta-1,4-dieny
- Alkylene or “alkylene chain” refers to a straight or branched divalent hydrocarbon chain linking the rest of the molecule to a radical group, consisting solely of carbon and hydrogen, which is saturated or unsaturated (i.e., contains one or more double and/or triple bonds), and having from one to twelve carbon atoms, e.g ., methylene, ethylene, propylene, n -butylene, ethenylene, propenylene, n-butenylene, propynylene, n-butynylene, and the like.
- the alkylene chain is attached to the rest of the molecule through a single or double bond and to the radical group through a single or double bond.
- the points of attachment of the alkylene chain to the rest of the molecule and to the radical group can be through one carbon or any two carbons within the chain. Unless stated otherwise specifically in the specification, an alkylene chain may be optionally substituted.
- Alkoxy refers to a radical of the formula -OR a where R a is an alkyl radical as defined above containing one to twelve carbon atoms. Unless stated otherwise specifically in the specification, an alkoxy group may be optionally substituted.
- Alkylamino refers to a radical of the formula -NHR a or -NR a R a where each R a is, independently, an alkyl radical as defined above containing one to twelve carbon atoms. Unless stated otherwise specifically in the specification, an alkylamino group may be optionally substituted.
- Thioalkyl refers to a radical of the formula -SR a where R a is an alkyl radical as defined above containing one to twelve carbon atoms. Unless stated otherwise specifically in the specification, a thioalkyl group may be optionally substituted.
- Aryl refers to a hydrocarbon ring system radical comprising hydrogen, 6 to 18 carbon atoms and at least one aromatic ring.
- the aryl radical may be a monocyclic, bicyclic, tricyclic or tetracyclic ring system, which may include fused or bridged ring systems.
- Aryl radicals include, but are not limited to, aryl radicals derived from aceanthrylene, acenaphthylene, acephenanthrylene, anthracene, azulene, benzene, chrysene, fluoranthene, fluorene, as -indacene, s-indacene, indane, indene, naphthalene, phenalene, phenanthrene, pleiadene, pyrene, and triphenylene.
- Aralkyl refers to a radical of the formula -R b -R c where R b is an alkylene chain as defined above and R c is one or more aryl radicals as defined above, for example, benzyl, diphenylmethyl and the like. Unless stated otherwise specifically in the specification, an aralkyl group may be optionally substituted.
- Cycloalkyl or “carbocyclic ring” refers to a stable non-aromatic monocyclic or polycyclic hydrocarbon radical consisting solely of carbon and hydrogen atoms, which may include fused or bridged ring systems, having from three to fifteen carbon atoms, preferably having from three to ten carbon atoms, and which is saturated or unsaturated and attached to the rest of the molecule by a single bond.
- Monocyclic radicals include, for example, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, and cyclooctyl.
- Polycyclic radicals include, for example, adamantyl, norbornyl, decalinyl, 7,7-dimethyl-bicyclo[2.2.1]heptanyl, and the like. Unless otherwise stated specifically in the specification, a cycloalkyl group may be optionally substituted.
- Cycloalkylalkyl refers to a radical of the formula -R b R d where R d is an alkylene chain as defined above and Rg is a cycloalkyl radical as defined above. Unless stated otherwise specifically in the specification, a cycloalkylalkyl group may be optionally substituted.
- fused refers to any ring structure described herein which is fused to an existing ring structure in the compounds of the invention.
- the fused ring is a heterocyclyl ring or a heteroaryl ring
- any carbon atom on the existing ring structure which becomes part of the fused heterocyclyl ring or the fused heteroaryl ring may be replaced with a nitrogen atom.
- Halo or halogen refers to bromo, chloro, fluoro or iodo.
- Haloalkyl refers to an alkyl radical, as defined above, that is substituted by one or more halo radicals, as defined above, e.g ., trifluoromethyl, difluoromethyl, trichloromethyl, 2,2,2-trifluoroethyl, 1,2-difluoroethyl, 3-bromo-2-fluoropropyl, 1,2-dibromoethyl, and the like. Unless stated otherwise specifically in the specification, a haloalkyl group may be optionally substituted.
- Heterocyclyl or “heterocyclic ring” refers to a stable 3- to 18-membered non-aromatic ring radical which consists of two to twelve carbon atoms and from one to six heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur.
- the heterocyclyl radical may be a monocyclic, bicyclic, tricyclic or tetracyclic ring system, which may include fused or bridged ring systems; and the nitrogen, carbon or sulfur atoms in the heterocyclyl radical may be optionally oxidized; the nitrogen atom may be optionally quaternized; and the heterocyclyl radical may be partially or fully saturated.
- heterocyclyl radicals include, but are not limited to, dioxolanyl, thienyl[1,3]dithianyl, decahydroisoquinolyl, imidazolinyl, imidazolidinyl, isothiazolidinyl, isoxazolidinyl, morpholinyl, octahydroindolyl, octahydroisoindolyl, 2-oxopiperazinyl, 2-oxopiperidinyl, 2-oxopyrrolidinyl, oxazolidinyl, piperidinyl, piperazinyl, 4-piperidonyl, pyrrolidinyl, pyrazolidinyl, quinuclidinyl, thiazolidinyl, tetrahydrofuryl, trithianyl, tetrahydropyranyl, thiomorpholinyl, thiamorpholinyl, 1-oxo-thio
- N -heterocyclyl refers to a heterocyclyl radical as defined above containing at least one nitrogen and where the point of attachment of the heterocyclyl radical to the rest of the molecule is through a nitrogen atom in the heterocyclyl radical. Unless stated otherwise specifically in the specification, a N -heterocyclyl group may be optionally substituted.
- Heterocyclylalkyl refers to a radical of the formula -R b R e where R b is an alkylene chain as defined above and R e is a heterocyclyl radical as defined above, and if the heterocyclyl is a nitrogen-containing heterocyclyl, the heterocyclyl may be attached to the alkyl radical at the nitrogen atom. Unless stated otherwise specifically in the specification, a heterocyclylalkyl group may be optionally substituted.
- Heteroaryl refers to a 5- to 14-membered ring system radical comprising hydrogen atoms, one to thirteen carbon atoms, one to six heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur, and at least one aromatic ring.
- the heteroaryl radical may be a monocyclic, bicyclic, tricyclic or tetracyclic ring system, which may include fused or bridged ring systems; and the nitrogen, carbon or sulfur atoms in the heteroaryl radical may be optionally oxidized; the nitrogen atom may be optionally quaternized.
- Examples include, but are not limited to, azepinyl, acridinyl, benzimidazolyl, benzothiazolyl, benzindolyl, benzodioxolyl, benzofuranyl, benzooxazolyl, benzothiazolyl, benzothiadiazolyl, benzo[ b ][1,4]dioxepinyl, 1,4-benzodioxanyl, benzonaphthofuranyl, benzoxazolyl, benzodioxolyl, benzodioxinyl, benzopyranyl, benzopyranonyl, benzofuranyl, benzofuranonyl, benzothienyl (benzothiophenyl), benzotriazolyl, benzo[4,6]imidazo[1,2-a]pyridinyl, carbazolyl, cinnolinyl, dibenzofuranyl, dibenzothiophenyl,
- N -heteroaryl refers to a heteroaryl radical as defined above containing at least one nitrogen and where the point of attachment of the heteroaryl radical to the rest of the molecule is through a nitrogen atom in the heteroaryl radical. Unless stated otherwise specifically in the specification, an N -heteroaryl group may be optionally substituted.
- Heteroarylalkyl refers to a radical of the formula -R b R f where R b is an alkylene chain as defined above and R f is a heteroaryl radical as defined above. Unless stated otherwise specifically in the specification, a heteroarylalkyl group may be optionally substituted.
- substituted means any of the above groups (i.e., alkyl, alkylene, alkoxy, alkylamino, thioalkyl, aryl, aralkyl, cycloalkyl, cycloalkylalkyl, haloalkyl, heterocyclyl, N -heterocyclyl, heterocyclylalkyl, heteroaryl, N- heteroaryl and/or heteroarylalkyl) wherein at least one hydrogen atom is replaced by a bond to a non-hydrogen atoms such as, but not limited to: a halogen atom such as F, Cl, Br, and I; an oxygen atom in groups such as hydroxyl groups, alkoxy groups, and ester groups; a sulfur atom in groups such as thiol groups, thioalkyl groups, sulfone groups, sulfonyl groups, and sulfoxide groups; a nitrogen atom in groups such as
- Substituted also means any of the above groups in which one or more hydrogen atoms are replaced by a higher-order bond (e.g ., a double- or triple-bond) to a heteroatom such as oxygen in oxo, carbonyl, carboxyl, and ester groups; and nitrogen in groups such as imines, oximes, hydrazones, and nitriles.
- a higher-order bond e.g ., a double- or triple-bond
- nitrogen in groups such as imines, oximes, hydrazones, and nitriles.
- Rg and R h are the same or different and independently hydrogen, alkyl, alkoxy, alkylamino, thioalkyl, aryl, aralkyl, cycloalkyl, cycloalkylalkyl, haloalkyl, heterocyclyl, N- heterocyclyl, heterocyclylalkyl, heteroaryl, N -heteroaryl and/or heteroarylalkyl.
- Substituted further means any of the above groups in which one or more hydrogen atoms are replaced by a bond to an amino, cyano, hydroxyl, imino, nitro, oxo, thioxo, halo, alkyl, alkoxy, alkylamino, thioalkyl, aryl, aralkyl, cycloalkyl, cycloalkylalkyl, haloalkyl, heterocyclyl, N -heterocyclyl, heterocyclylalkyl, heteroaryl, N -heteroaryl and/or heteroarylalkyl group.
- the above non-hydrogen groups are generally referred to herein as "substituents".
- each of the foregoing substituents may also be optionally substituted with one or more of the above substituents.
- Prodrug is meant to indicate a compound that may be converted under physiological conditions or by solvolysis to a biologically active compound of the invention.
- prodrug refers to a metabolic precursor of a compound of the invention that is pharmaceutically acceptable.
- a prodrug may be inactive when administered to a subject in need thereof, but is converted in vivo to an active compound of the invention.
- Prodrugs are typically rapidly transformed in vivo to yield the parent compound of the invention, for example, by hydrolysis in blood.
- the prodrug compound often offers advantages of solubility, tissue compatibility or delayed release in a mammalian organism (see, Bundgard, H., Design of Prodrugs (1985), pp. 7-9, 21-24 (Elsevier, Amsterd am)).
- prodrugs are provided in Higuchi, T., et al., A.C.S. Symposium Series, Vol. 14, and in Bioreversible Carriers in Drug Design, Ed. Edward B. Roche, American Pharmaceutical Association and Pergamon Press, 1987 .
- prodrug is also meant to include any covalently bonded carriers, which release the active compound of the invention in vivo when such prodrug is administered to a mammalian subject.
- Prodrugs of a compound of the invention may be prepared by modifying functional groups present in the compound of the invention in such a way that the modifications are cleaved, either in routine manipulation or in vivo, to the parent compound of the invention.
- Prodrugs include compounds of the invention wherein a hydroxy, amino or mercapto group is bonded to any group that, when the prodrug of the compound of the invention is administered to a mammalian subject, cleaves to form a free hydroxy, free amino or free mercapto group, respectively.
- Examples of prodrugs include, acetate, formate and benzoate derivatives of alcohol or amide derivatives of amine functional groups in the compounds of the invention.
- Solid compound and “stable structure” are meant to indicate a compound that is sufficiently robust to survive isolation to a useful degree of purity from a reaction mixture, and formulation into an efficacious therapeutic agent.
- “Mammal” includes humans and both domestic animals such as laboratory animals and household pets (e.g., cats, dogs, swine, cattle, sheep, goats, horses, rabbits), and non-domestic animals such as wildlife and the like.
- Optional or “optionally” means that the subsequently described event or circumstances may or may not occur, and that the description includes instances where said event or circumstance occurs and instances in which it does not.
- optionally substituted aryl means that the aryl radical may or may not be substituted and that the description includes both substituted aryl radicals and aryl radicals having no substitution.
- “Pharmaceutically acceptable carrier, diluent or excipient” includes without limitation any adjuvant, carrier, excipient, glidant, sweetening agent, diluent, preservative, dye/colorant, flavor enhancer, surfactant, wetting agent, dispersing agent, suspending agent, stabilizer, isotonic agent, solvent, or emulsifier which has been approved by the United States Food and Drug Administration as being acceptable for use in humans or domestic animals.
- “Pharmaceutically acceptable salt” includes both acid and base addition salts.
- “Pharmaceutically acceptable acid addition salt” refers to those salts which retain the biological effectiveness and properties of the free bases, which are not biologically or otherwise undesirable, and which are formed with inorganic acids such as, but are not limited to, hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid and the like, and organic acids such as, but not limited to, acetic acid, 2,2-dichloroacetic acid, adipic acid, alginic acid, ascorbic acid, aspartic acid, benzenesulfonic acid, benzoic acid, 4-acetamidobenzoic acid, camphoric acid, camphor-10-sulfonic acid, capric acid, caproic acid, caprylic acid, carbonic acid, cinnamic acid, citric acid, cyclamic acid, dodecylsulfuric acid, ethane-1,2-disulfonic acid, ethanesulfonic acid, 2-hydroxyethanesulfonic
- “Pharmaceutically acceptable base addition salt” refers to those salts which retain the biological effectiveness and properties of the free acids, which are not biologically or otherwise undesirable. These salts are prepared from addition of an inorganic base or an organic base to the free acid. Salts derived from inorganic bases include, but are not limited to, the sodium, potassium, lithium, ammonium, calcium, magnesium, iron, zinc, copper, manganese, aluminum salts and the like. Preferred inorganic salts are the ammonium, sodium, potassium, calcium, and magnesium salts.
- Salts derived from organic bases include, but are not limited to, salts of primary, secondary, and tertiary amines, substituted amines including naturally occurring substituted amines, cyclic amines and basic ion exchange resins, such as ammonia, isopropylamine, triethylamine, diethylamine, triethylamine, tripropylamine, diethanolamine, ethanolamine, deanol, 2-dimethylaminoethanol, 2-diethylaminoethanol, dicyclohexylamine, lysine, arginine, histidine, caffeine, procaine, hydrabamine, choline, betaine, benethamine, benzathine, ethylenediamine, glucosamine, methylglucamine, theobromine, triethanolamine, tromethamine, purines, piperazine, piperidine, N -ethylpiperidine, polyamine resins and the like.
- Particularly preferred organic bases
- solvate refers to an aggregate that comprises one or more molecules of a compound of the invention with one or more molecules of solvent.
- the solvent may be water, in which case the solvate may be a hydrate.
- the solvent may be an organic solvent.
- the compounds of the present invention may exist as a hydrate, including a monohydrate, dihydrate, hemihydrate, sesquihydrate, trihydrate, tetrahydrate and the like, as well as the corresponding solvated forms.
- the compound of the invention may be true solvates, while in other cases, the compound of the invention may merely retain adventitious water or be a mixture of water plus some adventitious solvent.
- a “pharmaceutical composition” refers to a formulation of a compound of the invention and a medium generally accepted in the art for the delivery of the biologically active compound to mammals, e.g., humans.
- a medium includes all pharmaceutically acceptable carriers, diluents or excipients therefor.
- Effective amount refers to that amount of a compound of the invention which, when administered to a mammal, preferably a human, is sufficient to inhibit phosphate transport, inhibit sodium-mediated phosphate uptake, reduce serum PTH, calcium, calcitriol, and phosphate concentrations or levels, treat renal disease or treat hyperphosphatemia in the mammal, preferably a human.
- the amount of a compound of the invention which constitutes a “therapeutically effective amount” will vary depending on the compound, the condition and its severity, the manner of administration, and the age of the mammal to be treated, but can be determined routinely by one of ordinary skill in the art having regard to his own knowledge and to this disclosure.
- Treating covers the treatment of the disease or condition of interest in a mammal, preferably a human, having the disease or condition of interest, and includes:
- the compounds of the invention, or their pharmaceutically acceptable salts may contain one or more asymmetric centers and may thus give rise to enantiomers, diastereomers, and other stereoisomeric forms that may be defined, in terms of absolute stereochemistry, as (R)- or ( S )- or, as (D)- or (L)- for amino acids.
- the present invention is meant to include all such possible isomers, as well as their racemic and optically pure forms.
- Optically active (+) and (-), (R)- and ( S )-, or (D)- and (L)- isomers may be prepared using chiral synthons or chiral reagents, or resolved using conventional techniques, for example, chromatography and fractional crystallization.
- stereoisomer refers to a compound made up of the same atoms bonded by the same bonds but having different three-dimensional structures, which are not interchangeable.
- the present invention contemplates various stereoisomers and mixtures thereof and includes “enantiomers”, which refers to two stereoisomers whose molecules are nonsuperimposeable mirror images of one another.
- a “tautomer” refers to a proton shift from one atom of a molecule to another atom of the same molecule.
- the present invention includes tautomers of any said compounds.
- compounds having activity as phosphate transport inhibitors are provided, the compounds having the following structure (I): or a stereoisomer, prodrug or pharmaceutically acceptable salt thereof, wherein:
- Y is halogen, such as chloro.
- Y is alkylamino, such as diethylamino.
- Y is alkoxy
- Y is heterocyclyl, such as 1-piperidinyl and the compound has the structure:
- Y is -O(cycloalkyl).
- X is -ZR 2 .
- Z is aryl or heteroaryl and R 2 represents a non-hydrogen substituent as defined above, or as more specifically defined below.
- Z is aryl, such as phenyl and the compound has the structure:
- Z is heteroaryl, such as pyridinyl and the compound has the structure:
- R 2 is:
- A is:
- A is:
- A is:
- A is:
- A is:
- A is:
- R 1 is optionally substituted aryl. In more specific embodiments, R 1 is phenyl. In other more specific embodiments, R 1 is substituted phenyl, such as trifluoromethylphenyl.
- any embodiment of the compounds of structure (I), as set forth above, and any specific substituent set forth herein for a X, Y, A, R 1 , R 2 , R 3 , R 4 , R 5 or R 6 group in the compounds of structure (I), as set forth above, may be independently combined with other embodiments and/or substituents of compounds of structure (I) to form embodiments of the inventions not specifically set forth above.
- substituents of compounds of structure (I) may be independently combined with other embodiments and/or substituents of compounds of structure (I) to form embodiments of the inventions not specifically set forth above.
- substituents in the event that a list of substitutents is listed for any particular substituent in a particular embodiment and/or claim, it is understood that each individual substituent may be deleted from the particular embodment and/or claim and that the remaining list of substituents will be considered to be within the scope of the invention.
- phosphate absorption from the intestine in patients with elevated phosphate serum levels may be limited, and preferably substantially prevented, through inhibition of the intestinal transport system which mediates phosphate uptake in the intestine.
- This inhibition may be achieved by the administration of certain compounds, and/or pharmaceutical compositions comprising them, which may advantageously be designed such that little, or substantially none, of the compound is absorbed into the blood stream (that is, it is designed to be non-systemic or substantially non-systemic).
- Such compounds are described as generally abiding by "Ardelyx Rules.”
- the compounds have features that give rise to little or substantially no systemic availability. In other words, the compounds are not absorbed into the bloodstream at meaningful levels and therefore have no activity there, but instead have their activity localized substantially within the GI tract.
- the compounds of the invention generally require a combination of structural and/or functional features relating or contributing to their activity in the GI tract and/or their substantial non-systemic bioavailability.
- Such features may include, for example, one or more of (i) specific tPSA and/or MW values (e.g., at least about 190 ⁇ 2 and/or at least about 736 Daltons, respectively), (ii) specific levels of fecal recovery of the compound and/or its metabolites after administration (e.g., greater than 50% at 72 hours); (iii) specific numbers of NH and/or OH and/or potentially hydrogen bond donor moieties (e.g., greater than about five); (iv) specific numbers of rotatable bonds (e.g., greater than about five); (iv) specific permeability features (e.g., P app less than about 100 x 10 -6 cm/s); and/or any of a number of other features and characteristics as described here
- the compounds of the present invention offer numerous advantages in the treatment of GI tract and other disorders.
- the compounds are active on the phosphate transporter apically located in the intestine and essentially do not reach other phosphate transporters expressed in other tissues and organs.
- the NaPi2b transporter is primarily expressed in the apical membrane of intestinal enterocytes, but is also found in salivary glands, mammary glands, lung, kidney, pancreas, ovary, prostate, testis and liver ( Feild et al., 1999, Biochem Biophys Res Commun, v. 258, no. 3, p. 578-582 ; Bai et al., 2000, Am J Physiol Cell Physiol, v. 279, no.
- the essentially non-systemic NaPi2b inhibitors of the present invention do not interfere with the pulmonary function of NaPi2b and, therefore, potential pulmonary toxicity is minimized.
- certain patient populations to whom the compounds of the invention may be administered are expected to have limited kidney clearance rate secondary to a declining kidney function.
- systemic compounds with some kidney clearance contribution in their excretion pathway can accumulate in the plasma, potentially leading to undesired side-effects in those patients with chronic kidney disease ( Sica, 2008, J Clin Hypertens.(Greenwich.), v. 10, no. 7, p. 541-548 ).
- the compounds of the invention do not give rise to these same concerns because of their limited systemic availability.
- phosphate absorption in the upper intestine is mediated, at least in part, by a carrier-mediated mechanism which couples the absorption of phosphate to that of sodium. Accordingly, inhibition of intestinal phosphate transport will reduce body phosphorus overload.
- the body phosphorus overload manifests itself by serum phosphate concentration above normal levels, i.e. hyperphosphatemia. Hyperphosphatemia is directly related to mortality and morbidity. Inhibition of intestinal phosphate transport will reduce serum phosphate concentration and therefore improve outcome in those patients.
- stage 2 and 3 chronic kidney disease patients the body phosphorus overload does hot necessarily lead to hyperphosphatemia, i.e.
- phosphate (Pi) transporters use the inwardly directed electrochemical gradient of Na+ ions, established by the Na/K ATPase transporter, to drive Pi influx.
- These transporters fall in three distinct and unrelated Pi transporters proteins named type I, II and III.
- NaPi type I transporters comprise NaPi-I, mainly expressed in the proximal and distal renal tubules.
- NaPi type II transporters comprise NaPi2a, NaPi2b, and NaPi2c.
- NaPi2a is localized in the apical membrane of proximal renal tubule, but is also detected in rat brain, osteoclasts and osteoblast-like cells.
- NaPi2b is expressed in the apical membrane of enterocytes, but also found in lung, colon, testis and liver (see, e.g., Virkki, L.V., et al., Phosphate Transporters: A Tale of Two Solute Carrier Families, Am. J. Physiol. Renal. Physiol., 293(3):F643-54 (2007 )).
- Type III NaPi transporters comprise PiT-1 and PiT-2, which are now emerging as important players in bone Pi metabolism and vascular calcification.
- NaPi2a is believed to play a key role in phosphorus homeostasis by controlling the reabsorption of Pi in the renal proximal tubule. This is exemplified in NaPi2a KO mice, which develop hyperphosphaturia and hypophosphatemia.
- NaPi2b is believed responsible for transepithelial absorption in the small intestine and is regulated by dietary Pi and vitamin D (Calcitriol (1,25-Dihydroxycholecalciferol)).
- NaPi2c is expressed in renal tubule and other tissues ( see, e.g., Virkki, L.V. , et al., Id.).
- NaPi2a and NaPi2b are electrogenic with a stoichiometry of about 3:1 Na + :HPO 4 2- , meaning that 3 Na + are co-transported with one phosphate anion.
- the additional Na cations translocated are excreted on the basolateral membrane via the K/Na ATPase active transporters to preserve cell polarization.
- Renal Pi transporter NaPi2a activity is increased in the kidney in response to low dietary Pi ( see, e.g., Murer, et al., Id.). This results from an increase in transporter expression on the apical membrane of the kidney tubule. Histochemical analysis suggests a "recruitment" phenomenon. It is to be noted that, in contrast, the type I Na-Pi transporter does not respond to change in dietary P. The change in NaPi2a expression is paralleled by alteration in parathyroid hormone PTH plasma concentration and vice-versa (e.g., injection of PTH in rats leads within minutes to a reduction in brush border membrane transporter content). Acid-base change can also alter expression of NaPi2a.
- the compounds described herein are designed to be substantially active or localized in the gastrointestinal lumen of a human or animal subject.
- gastrointestinal lumen is used interchangeably herein with the term “lumen,” to refer to the space or cavity within a gastrointestinal tract (GI tract, which can also be referred to as the gut), delimited by the apical membrane of GI epithelial cells of the subject.
- the compounds are not absorbed through the layer of epithelial cells of the GI tract (also known as the GI epithelium).
- Gastrointestinal mucosa refers to the layer(s) of cells separating the gastrointestinal lumen from the rest of the body and includes gastric and intestinal mucosa, such as the mucosa of the small intestine.
- a "gastrointestinal epithelial cell” or a “gut epithelial cell” as used herein refers to any epithelial cell on the surface of the gastrointestinal mucosa that faces the lumen of the gastrointestinal tract, including, for example, an epithelial cell of the stomach, an intestinal epithelial cell, a colonic epithelial cell, and the like.
- “Substantially systemically non-bioavailable” and/or “substantially impermeable” as used herein (as well as variations thereof) generally refer to situations in which a statistically significant amount, and in some embodiments essentially all of the compound of the present disclosure, remains in the gastrointestinal lumen.
- localization to the gastrointestinal lumen refers to reducing net movement across a gastrointestinal layer of epithelial cells, for example, by way of both transcellular and paracellular transport, as well as by active and/or passive transport.
- the compound in such embodiments is hindered from net permeation of a layer of gastrointestinal epithelial cells in transcellular transport, for example, through an apical membrane of an epithelial cell of the small intestine.
- the compound in these embodiments is also hindered from net permeation through the "tight junctions" in paracellular transport between gastrointestinal epithelial cells lining the lumen.
- the compound is essentially not absorbed at all by the GI tract or gastrointestinal lumen.
- the terms “substantially impermeable” or “substantially systemically non-bioavailable” refers to embodiments wherein no detectable amount of absorption or permeation or systemic exposure of the compound is detected, using means generally known in the art.
- substantially impermeable or substantially systemically non-bioavailable provides or allows for some limited absorption in the GI tract, and more particularly the gut epithelium, to occur (e.g., some detectable amount of absorption, such as for example at least about 0.1%, 0.5%, 1% or more and less than about 30%, 20%, 10%, 5%, etc., the range of absorption being for example between about 1% and 30%, or 5% and 20%, etc.); stated another way, “substantially impermeable” or “substantially systemically non-bioavailable” refers to compounds that exhibit some detectable permeability to an epithelial layer of cells in the GI tract of less than about 20% of the administered compound (e.g., less than about 15%, about 10%, or even about 5%, and for example greater than about 0.5%, or 1%), but then are cleared by the liver (i.e., hepatic extraction) and/or the kidney (i.
- a recovered compound can include the sum of the parent compound and its metabolites derived from the parent compound, e.g ., by means of hydrolysis, conjugation, reduction, oxidation, N-alkylation, glucuronidation, acetylation, methylation, sulfation, phosphorylation, or any other modification that adds atoms to or removes atoms from the parent compound, wherein the metabolites are generated via the action of any enzyme or exposure to any physiological environment including, pH, temperature, pressure, or interactions with foodstuffs as they exist in the digestive milieu. Measurement of fecal recovery of compound and metabolites can be carried out using standard methodology.
- compound can be administered orally at a suitable dose (e.g., 10 mg/kg) and feces are then collected at predetermined times after dosing (e.g., 24 hours, 48 hours, 72 hours).
- a suitable dose e.g. 10 mg/kg
- feces are then collected at predetermined times after dosing (e.g., 24 hours, 48 hours, 72 hours).
- Parent compound and metabolites can be extracted with organic solvent and analyzed quantitatively using mass spectrometry.
- the phosphate transport inhibitors of the present invention are not competitive inhibitors with respect to phosphate of Na/phosphate co-transport.
- the phosphate transport inhibitors of the invention are non-competitive inhibitors. Non-competitive inhibitors maintain their degree of inhibition irrespective of the local phosphate concentration. This feature is an important aspect in providing an efficient blockade of intestinal transport in postprandial state, where the local concentration of dietary phosphate can attain concentration as high as 10 mM. It is believed that competitive inhibitors are too sensitive to local phosphate concentration and unable to block phosphate uptake following a high phosphorus meal. Various methods are available for determining whether a phosphate transport inhibitor is non-competitive or competitive.
- a phosphate uptake assay can be peformed and the IC 50 values for a compound at different phosphate concentrations can be determined (e.g., " Enzyme kinetics", I.Segel, 1975, John-Wiley & Sons, p.123 ). IC 50 values for non-competitive inhibitors will remain the same or similar with respect to the phosphate concentration, whereas IC 50 values for competitive inhibitors will increase (i.e lose potency) as phosphate concentration increases.
- the ability of the compound to be substantially systemically non-bioavailable is based on the compound charge, size, and/or other physicochemical parameters (e.g., polar surface area, number of hydrogen bond donors and/or acceptors therein, number of freely rotatable bonds, etc.).
- the absorption character of a compound can be selected by applying principles of pharmacokinetics, for example, by applying Lipinski's rule, also known as "the rule of five.”
- Lipinski shows that small molecule drugs with (i) a molecular weight, (ii) a number of hydrogen bond donors, (iii) a number of hydrogen bond acceptors, and/or (iv) a water/octanol partition coefficient (Moriguchi Log P), greater than a certain threshold value, generally do not show significant systemic concentration (i.e., are generally not absorbed to any significant degree).
- substantially systemically non-bioavailable compounds e.g., substantially systemically non-bioavailable phosphate transport inhibitor compounds
- Lipinski et al. Experimental and Computational Approaches to Estimate Solubility and Permeability in Drug Discovery and Development Settings, Adv. Drug Delivery Reviews, 46:3-26 (2001 ); and Lipinski, Drug-like Properties and the Causes of Poor Solubility and Poor Permeability, J. Pharm. & Toxicol. Methods, 44:235-249 (2000 ), incorporated herein by reference.
- a substantially impermeable or substantially systemically non-bioavailable phosphate transport inhibitor compound of the present disclosure can be constructed to feature one or more of the following characteristics: (i) a MW greater than about 500 Da, about 1000 Da, about 2500 Da, about 5000 Da, about 10,000 Da or more (in the non-salt form of the compound); (ii) a total number of NH and/or OH and/or other potential hydrogen bond donors greater than about 5, about 10, about 15 or more; (iii) a total number of O atoms and/or N atoms and/or other potential hydrogen bond acceptors greater than about 5, about 10, about 15 or more; (iv) a Moriguchi partition coefficient greater than about 10 5 (i.e., Log P greater than about 5, about 6, about 7, etc.), or alternatively less than about 10 (i.e., a Log P of less than 1, or even 0); and/or (v) a total number of rotatable bonds greater than about 5, about 10 or about 15, or
- the molecular polar surface area (i.e., "PSA"), which may be characterized as the surface belonging to polar atoms, is a descriptor that has also been shown to correlate well with passive transport through membranes and, therefore, allows prediction of transport properties of drugs. It has been successfully applied for the prediction of intestinal absorption and Caco2 cell monolayer penetration. (For Caco2 cell monolayer penetration test details, see for example the description of the Caco2 Model provided in Example 31 of U.S. Pat. No.
- PSA is expressed in ⁇ 2 (squared angstroms) and is computed from a three-dimensional molecular representation.
- a fast calculation method is also available (see, e.g., Ertl et al., Journal of Medicinal Chemistry, 2000, 43, 3714-3717 , the entire contents of which are incorporated herein by reference for all relevant and consistent purposes) using a desktop computer and commercially available chemical graphic tools packages, such as ChemDraw.
- topological PSA tPSA
- tPSA is well correlated with human absorption data with common drugs (see, e.g., Table 1, below): Table 1 name % FAR a TPSA b metoprolol 102 50.7 nordiazepam 99 41.5 diazepam 97 32.7 oxprenolol 97 50.7 phenazone 97 26.9 oxazepam 97 61.7 alprenolol 96 41.9 practolol 95 70.6 pindolol 92 57.3 ciprofloxacin 69 74.6 metolazone 64 92.5 tranexamic acid 55 63.3 atenolol 54 84.6 sulpiride 36 101.7 mannitol 26 121.4 foscarnet 17 94.8 sulfasalazine 12 141.3 olsalazine 2.3 139.8 lactulose 0.6 197.4 raffinose 0.3 268.7 (from Ertl et al., J
- the compounds of the present disclosure may be constructed to exhibit.a tPSA value greater than about 100 ⁇ 2 , about 120 ⁇ 2 , about 130 ⁇ 2 , or about 140 ⁇ 2 , and in some instances about 150 ⁇ 2 , about 160 ⁇ 2 , about 170 ⁇ 2 , about 180 ⁇ 2 , about 190 ⁇ 2 , about 200 ⁇ 2 , about 225 ⁇ 2 ,about 250 ⁇ 2 , about 270 ⁇ 2 , about 300 ⁇ 2 , about 350 ⁇ 2 ,about 400 ⁇ 2 , about 450 ⁇ 2 , about 500 ⁇ 2 , about 750 ⁇ 2 , or even about 1000 ⁇ 2 ,such that the compounds are substantially impermeable or substantially systemically non-bioavailable (as defined elsewhere herein).
- the permeability properties of the compounds of the present disclosure may be screened experimentally.
- the permeability coefficient can be determined by methods known to those of skill in the art, including for example by Caco-2 cell permeability assay and/or using an artificial membrane as a model of a gastrointestinal epithelial cell.
- a synthetic membrane impregnated with, for example, lecithin and/or dodecane to mimic the net permeability characteristics of a gastrointestinal mucosa may be utilized as a model of a gastrointestinal mucosa.
- the membrane can be used to separate a compartment containing the compound of the present disclosure from a compartment where the rate of permeation will be monitored.
- PAMPA membrane permeability assays
- the compounds utilized in the methods of the present disclosure may have a permeability coefficient, P app , of less than about 100 x 10 -6 cm/s, or less than about 10 x 10 -6 cm/s, or less than about 1 x 10 -6 cm/s, or less than about 0.1 x 10 -6 cm/s, when measured using means known in the art (such as for example the permeability experiment described in extractsland et al., J. Med. Chem., 2001, 44. 923-930 , the contents of which is incorporated herein by reference).
- phosphate transport inhibitors may be modified to hinder their net absorption through a layer of gut epithelial cells, rendering them substantially systemically non-bioavailable.
- the compounds of the present disclosure comprise a phosphate transport inhibitor linked, coupled or otherwise attached to a non-absorbable moiety, which may be an oligomer moiety, a polymer moiety, a hydrophobic moiety, a hydrophilic moiety, and/or a charged moiety, which renders the overall compound substantially impermeable or substantially systemically non-bioavailable.
- the phosphate transport inhibitor is coupled to a multimer or polymer portion or moiety, such that the resulting molecule is substantially impermeable or substantially systemically non-bioavailable.
- the multimer or polymer portion or moiety may be of a molecular weight greater than about 500 Daltons (Da), about 1000 Da, about 2500 Da, about 5000 Da, about 10,000 Da or more, and in particular may have a molecular weight in the range of about 1000 Daltons (Da) to about 500,000 Da, preferably in the range of about 5000 to about 200,000 Da, and more preferably may have a molecular weight that is sufficiently high to essentially preclude any net absorption through a layer of gut epithelial cells of the compound.
- the phosphate transport inhibitor is modified to substantially hinder its net absorption through a layer of gut epithelial cells.
- the substantially impermeable or substantially systemically non-bioavailable compounds utilized in the treatment methods of the present disclosure may additionally exhibit a persistent inhibitor effect. This effect manifests itself when the inhibitory action of a compound at a certain concentration in equilibrium with epithelial cells (e.g., at or above its inhibitory concentration, IC) does not revert to baseline (i.e., phosphate transport without inhibitor) after the compound is depleted by simple washing of the luminal content.
- IC inhibitory concentration
- This effect can be interpreted as a result of the tight binding of the compounds to the phosphate transport protein at the intestinal apical side of the gut epithelial cell.
- the binding can be considered as quasi-irreversible to the extent that, after the compound has been contacted with the gut epithelial cell and subsequently washed off said gut epithelial cell, the flux of phosphate transport is still significantly lower than in the control without the compound.
- This persistent inhibitory effect has the clear advantage of maintaining drug activity within the GI tract even though the residence time of the active in the upper GI tract is short, and when no entero-biliary recycling process is effective to replenish the compound concentration near its site of action.
- Such a persistent inhibitory effect has an obvious advantage in terms of patient compliance, but also in limiting drug exposure within the GI tract.
- the persistence effect can be determined using in vitro methods; in one instance, cell lines expressing phosphate transporters are split in different vials and treated with a phosphate transport inhibiting compound and phosphate solution to measure the rate of phosphate uptake. The cells in one set of vials are washed for different periods of time to remove the inhibitor, and phosphate uptake measurement is repeated after the washing. Compounds that maintain their inhibitory effect after multiple/lengthy washing steps (compared to the inhibitory effect measured in the vials where washing does not occur) are persistent inhibitors.
- Persistence effect can also be characterized ex vivo by using the everted sac technique, whereby transport of phosphate is monitored using an excised segment of GI perfused with a solution containing the inhibitor and shortly after flushing the bathing solution with a buffer solution free from inhibitor.
- a persistence effect can also be characterized in vivo by observing the time needed for phosphate balance to return to normal when the inhibitor treatment is discontinued. The limit of the method resides in the fact that apical cells (and therefore apical phosphate transporters) are sloughed off after a period of 3 to 4 days, the typical turnover time of gut epithelial cells.
- a persistence effect can be achieved by increasing the residence time of the active compound at the apical surface of the gut epithelial cells; this can be obtained by designing phosphate transport inhibitors with several phosphate transport inhibiting moieties built-in the small molecule or oligomer (wherein "several” as used herein typically means at least about 2, about 4, about 6 or more). Examples of such structures in the context of analogs of the antibiotic vancomycin are given in Griffin, et al., J. Am. Chem. Soc., 2003, 125, 6517-6531 . Alternatively the compound comprises groups that contribute to increase the affinity towards the gut epithelial cell so as to increase the time of contact with the gut epithelial cell surface.
- Such groups are referred to as being "mucoadhesive.” More specifically, the Core or L moiety can be substituted by such mucoadhesive groups, such as polyacrylates, partially deacetylated chitosan or polyalkylene glycol. (See also Patil, S.B. et al., Curr. Drug. Deliv., 2008, Oct. 5(4), pp. 312-8 .)
- the compounds utilized in the treatment methods of the present disclosure are preferably substantially systemically non-bioavailable, and/or preferably exhibit a persistent inhibitory effect, it is also desirable that, during their prolonged residence time in the gut, these compounds resist the hydrolytic conditions prevailing in the upper GI tract. In such embodiments, compounds of the present disclosure are resistant to phase 1 and phase 2 metabolism.
- administered compounds are preferably resistant to the activity of P450 enzymes, glucurosyl transferases, sulfotransferases, glutathione S-transferases, and the like, in the intestinal mucosa, was well as gastric (e.g., gastric lipase, and pepsine), pancreatic (e.g., trypsin, triglyceride pancreatic lipase, phospholipase A2, endonucleases, nucleotidases, and alpha-amylase), and brush-border enzymes (e.g., alkaline phosphatase, glycosidases, and proteases) generally known in the art.
- gastric e.g., gastric lipase, and pepsine
- pancreatic e.g., trypsin, triglyceride pancreatic lipase, phospholipase A2, endonucleases, nucleotid
- the compounds that are utilized in methods of the present disclosure are also preferably resistant to metabolism by the bacterial flora of the gut; that is, the compounds are not substrates for enzymes produced by bacterial flora.
- the compounds administered in accordance with the methods of the present disclosure may be substantially inactive towards the gastrointestinal flora, and do not disrupt bacterial growth or survival.
- the minimal inhibitory concentration (or "MIC") against GI flora is desirably greater than about 15 ⁇ g/ml, about 30 ⁇ g/ml, about 60 ⁇ g/ml, about 120 ⁇ g/ml, or even about 240 ⁇ g/ml, the MIC in various embodiments being for example between about 16 and about 32 ⁇ g/ml, or between about 64 and about 128 ⁇ g/ml, or greater than about 256 ⁇ g/ml.
- metabolic stability can be achieved in a number of ways. Functionality susceptible to P450-mediated oxidation can be protected by, for example, blocking the point of metabolism with a halogen or other functional group. Alternatively, electron withdrawing groups can be added to a conjugated system to generally provide protection to oxidation by reducing the electrophilicity of the compound. Proteolytic stability can be achieved by avoiding secondary amide bonds, or by incorporating changes in stereochemistry or other modifications that prevent the drug from otherwise being recognized as a substrate by the metabolizing enzyme.
- one or more of the compounds detailed herein when administered either alone or in combination with one or more additional pharmaceutically active compounds or agents to a patient in need thereof has a C max that is less than the IC 50 for NaPi2b, more specifically, less than about 10X (10 times) the IC 50 , and, more specifically still, less than about 100X (100 times) the IC 50 .
- one or more of the compounds detailed herein when administered either alone or in combination with one or more additional pharmaceutically active compounds or agents to a patient in need thereof, may have a C max of less than about 10 ng/ml, about 7.5 ng/ml, about 5 ng/ml, about 2.5 ng/ml, about 1 ng/ml, or about 0.5 ng/ml, the C max being for example within the range of about 1 ng/ml to about 10 ng/ml, or about 2.5 ng/ml to about 7.5 ng/ml.
- one or more of the compounds detailed herein when administered either alone or in combination with one or more additional pharmaceutically active compounds or agents to a patient in need thereof, may have a IC 50 of less than about 10 ⁇ M, about 7.5 ⁇ M, about 5 ⁇ M, about 2.5 ⁇ M, about 1 ⁇ M, or about 0.5 ⁇ M, the IC 50 being for example within the range of about 0.5 ⁇ M to about 10 ⁇ M, or about 0.5 ⁇ M to about 7.5 ⁇ M, or about 0.5 ⁇ M to about 5 ⁇ M, or about 0.5 ⁇ M to about 2.5 ⁇ M.
- one or more of compounds detailed herein when administered to a patient in need thereof, may have a ratio of IC 50 :C max , wherein IC 50 and C max are expressed in terms of the same units, of at least about 10, about 50, about 100, about 250, about 500, about 750, or about 1000.
- the maximum compound concentration detected in the serum is lower than the NaPi2b inhibitory concentration IC 50 of said compound.
- IC 50 is defined as the quantitative measure indicating the concentration of the compound required to inhibit 50% of the NaPi2b transport activity in a cell based assay.
- the compounds of the present invention may be administered to a patient or subject as a raw chemical or may be formulated as pharmaceutical compositions.
- Pharmaceutical compositions of the present invention generally comprise a compound of the invention and a pharmaceutically acceptable carrier, diluent or excipient.
- the compound is present in the composition in an amount which is effective to treat a particular disease or condition of interest, as described herein, and preferably with acceptable toxicity to the patient.
- the activity of compounds can be determined by one skilled in the art, for example, as described in the Example below. Appropriate concentrations and dosages can be readily determined by one skilled in the art.
- a compound or composition of the invention may be used in a method for treating essentially any disease or other condition in a patient which would benefit from phosphate uptake inhibition in the gastrointestinal tract.
- kidney damage reduces the production and activity of renal 1-alpha hydroxylase, leading to lower 1,25-dihydroxy vitamin D.
- Decreased vitamin D levels limit gastrointestinal calcium absorption, leading to a decline in serum calcium levels.
- the combination of lower 1,25- dihydroxy vitamin D and lower serum calcium levels synergistically stimulate parathyroid tissue to produce and secrete PTH.
- a loss of nephrons also impairs Pi excretion, but serum P levels are actively defended by the actions of PTH and FGF-23, and by higher serum P levels, which considerably enhance urinary PO 4 excretion.
- tubular actions of PTH and FGF-23 cannot maintain serum P levels in the face of continual nephron loss.
- Phosphorus imbalance does not necessarily equate with hyperphosphatemia.
- the vast majority of CKD patients not yet on dialysis are normophosphatemic but their phosphorus balance is positive with the excess phosphorus being disposed in the vasculature in the form of ectopic calcification, e.g. intima localized vascular calcification.
- patients with CKD have elevated levels of FGF-23 that are significantly associated with deteriorating renal function and with decreased calcitriol levels, and it has been hypothesized that the synthesis of FGF-23 is induced by the presence of excess P in the body consecutive to renal failure.
- a compounds or composition of the invention can be used in a method selected from the group consisting of: (a) a method for treating hyperphosphatemia; (b) a method for treating a renal disease (e.g. , chronic kidney disease or end stage renal disease); (c) a method for delaying time to dialysis; (d) a method for attenuating intima localized vascular calcification; (e) a method for reducing the hyperphosphatemic effect of active vitamin D; (f) a method for reducing FGF23 levels; (g) a method for attenuating hyperparathyroidism; (h) a method for improving endothelial dysfunction induced by postprandial serum phosphate; (i) a method for reducing urinary phosphorous; (j) a method for normalizing serum phosphorus levels; (k) a method for treating proteinura; and (l) a method for reducing serum PTH, calcium, calcitriol and/or phosphat
- compositions of the invention can be prepared by combining a compound of the invention with an appropriate pharmaceutically acceptable carrier, diluent or excipient, and may be formulated into preparations in solid, semi-solid, liquid or gaseous forms, such as tablets, capsules, powders, granules, ointments, solutions, suppositories, injections, inhalants, gels, microspheres, and aerosols.
- compositions of the invention are formulated so as to allow the active ingredients contained therein to be bioavailable upon administration of the composition to a patient.
- Compositions that will be administered to a subject or patient take the form of one or more dosage units, where for example, a tablet may be a single dosage unit, and a container of a compound of the invention in aerosol form may hold a plurality of dosage units.
- composition to be administered will, in any event, contain a therapeutically effective amount of a compound of the invention, or a pharmaceutically acceptable salt thereof, for treatment of a disease or condition of interest in accordance with the teachings of this invention.
- a pharmaceutical composition of the invention may be in the form of a solid or liquid.
- the carrier(s) are particulate, so that the compositions are, for example, in tablet or powder form.
- the carrier(s) may be liquid, with the compositions being, for example, an oral syrup, injectable liquid or an aerosol, which is useful in, for example, inhalatory administration.
- the pharmaceutical composition When intended for oral administration, the pharmaceutical composition is preferably in either solid or liquid form, where semi-solid, semi-liquid, suspension and gel forms are included within the forms considered herein as either solid or liquid.
- the pharmaceutical composition may be formulated into a powder, granule, compressed tablet, pill, capsule, chewing gum, wafer or the like form.
- a solid composition will typically contain one or more inert diluents or edible carriers.
- binders such as carboxymethylcellulose, ethyl cellulose, microcrystalline cellulose, gum tragacanth or gelatin; excipients such as starch, lactose or dextrins, disintegrating agents such as alginic acid, sodium alginate, Primogel, corn starch and the like; lubricants such as magnesium stearate or Sterotex; glidants such as colloidal silicon dioxide; sweetening agents such as sucrose or saccharin; a flavoring agent such as peppermint, methyl salicylate or orange flavoring; and a coloring agent.
- excipients such as starch, lactose or dextrins, disintegrating agents such as alginic acid, sodium alginate, Primogel, corn starch and the like
- lubricants such as magnesium stearate or Sterotex
- glidants such as colloidal silicon dioxide
- sweetening agents such as sucrose or saccharin
- a flavoring agent such as peppermint, methyl sal
- the pharmaceutical composition when in the form of a capsule, for example, a gelatin capsule, it may contain, in addition to materials of the above type, a liquid carrier such as polyethylene glycol or oil.
- a liquid carrier such as polyethylene glycol or oil.
- the pharmaceutical composition may be in the form of a liquid, for example, an elixir, syrup, solution, emulsion or suspension.
- the liquid may be for oral administration or for delivery by injection, as two examples.
- preferred composition contain, in addition to the present compounds, one or more of a sweetening agent, preservatives, dye/colorant and flavor enhancer.
- a surfactant, preservative, wetting agent, dispersing agent, suspending agent, buffer, stabilizer and isotonic agent may be included.
- the liquid pharmaceutical compositions of the invention may include one or more of the following adjuvants: sterile diluents such as water for injection, saline solution, preferably physiological saline, Ringer's solution, isotonic sodium chloride, fixed oils such as synthetic mono or diglycerides which may serve as the solvent or suspending medium, polyethylene glycols, glycerin, propylene glycol or other solvents; antibacterial agents such as benzyl alcohol or methyl paraben; antioxidants such as ascorbic acid or sodium bisulfite; chelating agents such as ethylenediaminetetraacetic acid; buffers such as acetates, citrates or phosphates and agents for the adjustment of tonicity such as sodium chloride or dextrose.
- the parenteral preparation can be enclosed in ampoules, disposable syringes or multiple dose vials made of glass or plastic.
- Physiological saline is a preferred adjuvant.
- a liquid pharmaceutical composition of the invention intended for either parenteral or oral administration should contain an amount of a compound of the invention such that a suitable dosage will be obtained.
- the pharmaceutical composition of the invention may be intended for topical administration, in which case the carrier may suitably comprise a solution, emulsion, ointment or gel base.
- the base for example, may comprise one or more of the following: petrolatum, lanolin, polyethylene glycols, bee wax, mineral oil, diluents such as water and alcohol, and emulsifiers and stabilizers.
- Thickening agents may be present in a pharmaceutical composition for topical administration.
- the composition may include a transdermal patch or iontophoresis device.
- the pharmaceutical composition of the invention may be intended for rectal administration, in the form, for example, of a suppository, which will melt in the rectum and release the drug.
- the composition for rectal administration may contain an oleaginous base as a suitable nonirritating excipient.
- bases include, without limitation, lanolin, cocoa butter and polyethylene glycol.
- the pharmaceutical composition of the invention may include various materials, which modify the physical form of a solid or liquid dosage unit.
- the composition may include materials that form a coating shell around the active ingredients.
- the materials that form the coating shell are typically inert, and may be selected from, for example, sugar, shellac, and other enteric coating agents.
- the active ingredients may be encased in a gelatin capsule.
- the pharmaceutical composition of the invention in solid or liquid form may include an agent that binds to the compound of the invention and thereby assists in the delivery of the compound.
- Suitable agents that may act in this capacity include a monoclonal or polyclonal antibody, a protein or a liposome.
- the pharmaceutical composition of the invention may consist of dosage units that can be administered as an aerosol.
- aerosol is used to denote a variety of systems ranging from those of colloidal nature to systems consisting of pressurized packages. Delivery may be by a liquefied or compressed gas or by a suitable pump system that dispenses the active ingredients. Aerosols of compounds of the invention may be delivered in single phase, bi-phasic, or tri-phasic systems in order to deliver the active ingredient(s). Delivery of the aerosol includes the necessary container, activators, valves, subcontainers, and the like, which together may form a kit. One skilled in the art, without undue experimentation may determine preferred aerosols.
- compositions of the invention may be prepared by methodology well known in the pharmaceutical art.
- a pharmaceutical composition intended to be administered by injection can be prepared by combining a compound of the invention with sterile, distilled water so as to form a solution.
- a surfactant may be added to facilitate the formation of a homogeneous solution or suspension.
- Surfactants are compounds that non-covalently interact with the compound of the invention so as to facilitate dissolution or homogeneous suspension of the compound in the aqueous delivery system.
- the compounds of the invention are administered in a therapeutically effective amount, which will vary depending upon a variety of factors including the activity of the specific compound employed; the metabolic stability and length of action of the compound; the age, body weight, general health, sex, and diet of the patient; the mode and time of administration; the rate of excretion; the drug combination; the severity of the particular disorder or condition; and the subject undergoing therapy.
- a typical dosage of the substantially impermeable or substantially systemically non-bioavailable, compound may be between about 0.2 mg per day and about 2 g per day, or between about 1 mg and about 1 g per day, or between about 5 mg and about 500 mg, or between about 10 mg and about 250 mg per day, which is administered to a subject in need of treatment.
- the frequency of administration of the compounds and compositions described herein may vary from once-a-day (QD) to twice-a-day (BID) or thrice-a-day (TID), etc., the precise frequency of administration varying with, for example, the patient's condition, the dosage, etc.
- Compounds of the invention, or pharmaceutically acceptable derivatives thereof, may also be administered simultaneously with, prior to, or after administration of one or more other therapeutic agents.
- Such combination therapy includes administration of a single pharmaceutical dosage formulation which contains a compound of the invention and one or more additional active agents, as well as administration of the compound of the invention and each active agent in its own separate pharmaceutical dosage formulation.
- a compound of the invention and the other active agent can be administered to the patient together in a single oral dosage composition such as a tablet or capsule, or each agent administered in separate oral dosage formulations.
- the compounds of the invention and one or more additional active agents can be administered at essentially the same time, i.e., concurrently, or at separately staggered times, i.e., sequentially; combination therapy is understood to include all these regimens.
- the additional biologically active agent included in a pharmaceutical composition (or method) of the invention is selected, for example, from vitamin D 2 (ergocalciferol), vitamin D 3 (cholecalciferol), active vitamin D (calcitriol) and active vitamin D analogs (e.g. doxercalciferol, paricalcitol).
- the additional biologically active agent included in a pharmaceutical composition (or method) of the invention is a phosphate binder, such as Renvela, Renagel, Fosrenol, calcium carbonate, calcium acetate (e.g. Phoslo), MCI-196, ZerenexTM, Fermagate, APS1585, SBR-759, PA-21, and the like.
- a phosphate binder such as Renvela, Renagel, Fosrenol, calcium carbonate, calcium acetate (e.g. Phoslo), MCI-196, ZerenexTM, Fermagate, APS1585, SBR-759, PA-21, and the like.
- the compounds of the invention have been found to act synergistically with phosphate binders by providing a higher efficacy than the sum of the efficacy of a NaPi2b inhibitor and that of a phosphate binder administered alone. Without wishing to be bound by theory, it is believed that the synergy results from the distinct mechanisms of action of a phosphate transport inhibitor and a phosphate binder. More specifically, a phosphate transport inhibitor blocks the epithelial inward transport of phosphate ions whereas phosphate binders sequester free phosphate ions in the lumen of the intestine.
- the efficacy of a phosphate binder is essentially dictated by: i) the density of binding sites (i.e. amine groups in Renvela / Sevelamer, a polymeric amine material; or multivalent cations such calcium or lanthanum in Phoslo (Calcium acetate) or Fosrenol (lanthanum carbonate)); and ii) the affinity of said binding sites for phosphate ions. Notably only a fraction of the binding sites is available for phosphate binding in vivo as other anions, such as bile acids and fatty acids compete for the binding sites and therefore lowers efficacy.
- Bound phosphate ions are in equilibrium with free phosphate in the intestinal lumen and are themselves subject to intense pumping from phosphate transport proteins lining up the epithelia.
- the efficacy of phosphate intestinal uptake is remarkably high, exceeding 95% of the phosphate presented to the epithelia.
- the active transport of phosphate contributes to lower the luminal free phosphate concentration and therefore to drive the binding equilibrium of a phosphate binder to lower binding capacity.
- a phosphate transport inhibitor one restores a higher in vivo binding capacity of phosphate sequestering agents.
- the synergistic effect is thought to be even more pronounced when the contribution of active phosphate transport is increased as a result of, e.g. vitamin D treatment, an agent promoting NaPi2b expression.
- Suitable protecting groups include hydroxy, amino, mercapto and carboxylic acid.
- Suitable protecting groups for hydroxy include trialkylsilyl or diarylalkylsilyl (for example, t-butyldimethylsilyl, t-butyldiphenylsilyl oar trimethylsilyl), tetrahydropyranyl, benzyl, and the like.
- Suitable protecting groups for amino, amidino and guanidino include t -butoxycarbonyl, benzyloxycarbonyl, and the like.
- Suitable protecting groups for mercapto include -C(O)-R" (where R" is alkyl, aryl or arylalkyl), p -methoxybenzyl, trityl and the like.
- Suitable protecting groups for carboxylic acid include alkyl, aryl or arylalkyl esters.
- Protecting groups may be added or removed in accordance with standard techniques, which are known to one skilled in the art and as described herein. The use of protecting groups is described in detail in Green, T.W. and P.G.M. Wutz, Protective Groups in Organic Synthesis (1999), 3rd Ed., Wiley .
- the protecting group may also be a polymer resin such as a Wang resin, Rink resin or a 2-chlorotrityl-chloride resin.
- Example 1 N1-methyl-N1-(2-morpholinothyl)-N3-(4-(piperidin-1-yl)-2-(5-(3- ( trifluoromethyl ) phenyl)-2H-1,2,4-triazol-3-ylcarbamoyl)phenyl)isophthalamide .
- the mixture was diluted with 50 mL of ethyl acetate, washed with 2x20 mL of NH 4 Cl and 2x20 mL of brine, dried over anhydrous sodium sulfate and then concentrated under vacuum.
- the crude product (50 mg) was purified by reverse phase HPLC eluting with a water/CH 3 CN gradient containing 0.05% TFA. The product was obtained as 12 mg (10%) of a yellow solid.
- Example 2 N1-methyl-N1-(2-morpholinoethyl)-N3-(4-piperidin-1-yl)-2-((1-(3-(trifluoromethyl)phenyl)-1H-1,2,4-triazol-3-yl)carbamoyl)phenyl)isophthalamide.
- Example 3 N1-methyl-N1-(2-morpholinoethyl)-N3-(4-(piperidin-1-yl)-2-((4-(3-(trifluoromethyl)phenyl)thiazol-2-yl)carbamoy)phenyl)isophthalamide.
- the resulting solution was stirred for 1 h at room temperature, then diluted with 50 mL of ethyl acetate. The resulting mixture was washed with 1x20 mL of hydrogen chloride (1 N) and 2x20 mL of brine. The mixture was dried over anhydrous sodium sulfate and concentrated under vacuum.
- the crude product (300 mg) was purified by reverse phase HPLC eluting with a water/CH 3 CN gradient containing 0.05% TFA. The product was obtained as 120 mg (20%) of as a yellow solid.
- the reaction progress was monitored by LCMS.
- the resulting solution was diluted with 300 mL of water.
- the resulting solution was extracted with 4x100 mL of ethyl acetate and the organic layers combined.
- the resulting mixture was washed with 3x100 mL of water and 1x100 mL of brine.
- the mixture was dried over anhydrous sodium sulfate.
- the solids were filtered out.
- the resulting mixture was concentrated under vacuum.
- the residue was applied onto a silica gel column and eluted with ethyl acetate/petroleum ether (1:10) to give 1 g (9%) of 1-(3,4-dimethylphenyl)-3-nitro-1H-pyrazole as a yellow solid.
- Example 4 3-(3-(4-chloro-2-(1-(3,4-dimethylphenyl)-1H-pyrazol-3-ylcarbamoyl)-phenylcarbamoyl)benzylthio)propanoic acid.
- Example 5 3-3-(3-(2-(1-(3,4-dimethylphenyl)-1H-pyrazol-3-ylcarbamoyl)-4-(piperidin-1-yl)phenylcarbamoyl)benzylthio)propanoic acid.
- the resulting solution was stirred overnight at 85°C in an oil bath. The reaction progress was monitored by LCMS. The resulting solution was diluted with 500 mL of water, extracted with 7x200 mL of ethyl acetate and the organic layers combined. The resulting mixture was washed with 3x200 mL of water and 2x200 mL of brine. The mixture was dried over sodium sulfate. The solids were filtered out. The resulting mixture was concentrated under vacuum.
- Example 6 3-(3-(4-chloro-2-(1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-ylcarbamoyl)-phenylcarbamoyl)benzylthio)propanoic acid.
- This compound was prepared from 5-chloro-2-nitro-N-(1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-yl)benzamide 6c using the procedure described for the preparation of 3-(3-(2-(1-(3,4-dimethylphenyl)-1H-pyrazol-3-ylcarbamoyl)-4-(piperidin-1-yl)phenylcarbamoyl)-benzylthio)propanoic acid 5 from 5-chloro-N-(1-(3,4-dimethylphenyl)-1H-pyrazol-3-yl)-2-nitrobenzamide 4g.
- the resulting solution was stirred overnight at 50°C in an oil bath. The reaction progress was monitored by LCMS. The resulting solution was diluted with 200 mL of water, extracted with 4x50 mL of ethyl acetate, and the organic layers combined. The resulting mixture was washed with 2x50 mL of water and 2x50 mL of brine. The mixture was dried over sodium sulfate. The solids were filtered out. The resulting mixture was concentrated under vacuum. The residue was applied onto a silica gel column and eluted with petroleum ether/ethyl acetate (5:1) to yield 2.8 g (36%) of product as a yellow solid.
- the resulting solution was stirred for 2.5 h at 70°C in an oil bath. The reaction progress was monitored by LCMS. The resulting solution was diluted with 50 mL of water. The resulting solution was extracted with 3x50 mL of ethyl acetate and the organic layers combined. The resulting mixture was washed with 3x50 mL of brine, dried over anhydrous sodium sulfate, and concentrated under vacuum. This resulted in
- Example 8 2-methyl-1-(6-((4-(piperidin-1-yl)-2-((1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-yl)carbamoyl)phenyl)carbamoyl)pyridin-2-yl)-5,8,11-trioxa-2-azatetradecan-14-oic acid.
- Example 9 2-(4-(((2-(diethylamino)ethyl)(methyl)amino)methyl)benzamido)-5-(piperidin-1-yl)-N-(1-(3(trifluoromethyl)phenyl)-1H-pyrazol-3-yl)benzamide.
- the resulting solution was stirred overnight at 30°C in an oil bath. The reaction progress was monitored by LCMS. The resulting mixture was washed with 3x10 mL of water and 1x10 mL of brine. The mixture was dried over anhydrous sodium sulfate and concentrated under vacuum. The crude product (150 mg) was purified by reverse phase HPLC eluting with a water/CH 3 CN gradient containing 0.05% TFA. The product was obtained as 57.8 mg (31%) of a light yellow solid.
- the resulting solution was stirred overnight at 28°C.
- the resulting solution was diluted with 200 mL of dichloromethane.
- the resulting mixture was washed with 1x30 mL of 10% sodium bicarbonate and 1x30 mL of brine, dried over sodium sulfate, and concentrated under vacuum.
- the residue was applied onto a silica gel column and eluted with ethyl acetate/petroleum ether (1:1) to give 600 mg (22%) of product as brown oil.
- Example 10 N1-(2-(2-hydroxyethoxy)ethyl)-N3-(4-(piperidin-1-yl)-2-((1-(3-(trifluoro-methyl)phenyl)-1H-imidazol-4-yl)carbamoyl)phenyl)isophthalamideN1-(2-(2-hydroxy-ethoxy)ethyl)-N3-(4-(piperidin-1-yl)-2-((1-(3-(trifluoromethyl)phenyl)-1H-imidazol-4-yl)carbamoyl)phenyl)isophthalamide.
- the resulting solution was stirred overnight at 25°C.
- the resulting solution was diluted with 100 mL of dichloromethane.
- the resulting mixture was washed with 1x20 mL of 10% sodium bicarbonate and 1x20 mL of brine, dried over anhydrous sodium sulfate, and concentrated under vacuum.
- the residue was applied onto a silica gel column and eluted with dichloromethane/methanol (20:1).
- the crude product 120 mg was purified by reverse phase HPLC eluting with a water/CH 3 CN gradient containing 0.05% TFA.
- the product was obtained as 67.8 mg (22%) of a light yellow solid.
- the resulting solution was stirred for 4 h at 25°C in an oil bath.
- the reaction progress was monitored by LCMS.
- the resulting mixture was washed with 3x10 mL of water and 3x10 mL of aqueous NH 4 Cl.
- the mixture was dried over anhydrous sodium sulfate and concentrated under vacuum.
- the crude product was purified by reverse phase HPLC eluting with a water/CH 3 CN gradient containing 0.05% TFA.
- the product was obtained as 108.6 mg (66%) of a white solid.
- Example 12 2-(3-(((2-(diethylamino)ethyl)(methyl)amino)methyl)benzamido)-5-(piperidin-1-yl)-N-(1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-yl)benzamide.
- the resulting solution was stirred overnight at 30°C in an oil bath. The reaction progress was monitored by LCMS. The resulting mixture was washed with 3x10 mL of water and 1x10 mL of brine. The mixture was dried over sodium sulfate. The solids were filtered out. The resulting mixture was concentrated under vacuum. The crude product (150 mg) was purified by reverse phase HPLC eluting with a water/CH 3 CN gradient containing 0.05% TFA. The product was obtained as 58.5 mg (32%) of a yellow solid.
- the resulting solution was stirred for 1 h at room temperature.
- the resulting solution was diluted with 2 mL of water, and adjusted to pH 8 with NH 3 H 2 O (2 mol/L).
- the resulting solution was extracted with 2x5 mL of dichloromethane and the organic layers combined, dried over sodium sulfate, and concentrated under vacuum.
- the crude product (150 mg) was purified by reverse phase HPLC eluting with a water/CH 3 CN gradient containing 0.05% TFA. The product was obtained as 67.2 mg (22%) of a white solid.
- Example 15 2-methyl-1-oxo-1-(3-((4-(piperidin-1-yl)-2-((1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-yl)carbamoyl)phenyl)carbamoyl)phenyl)-5,8,11-trioxa-2-azatetradecan-14-oic acid.
- the resulting solution was stirred for 2 h at room temperature. The reaction progress was monitored by LCMS. The resulting mixture was concentrated under vacuum. The crude product was purified by reverse phase HPLC eluting with a water/CH 3 CN gradient containing 0.05% TFA. The product was obtained as 67.2 mg (42%) of a yellow solid.
- Example 16 2-(3-(((3-((2-methoxyethyl)amino)-3-oxopropyl)(methyl)amino)methyl)-benzamido)-5-(piperidin-1-yl)-N-(1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-yl)-benzamide.
- the resulting solution was stirred overnight at 70°C in an oil bath. The reaction progress was monitored by LCMS. The resulting solution was diluted with 20 mL of water. The resulting solution was extracted with 3x20 mL of ethyl acetate and the organic layers combined. The resulting mixture was washed with 3x20 mL of brine, dried over anhydrous sodium sulfate, and concentrated under vacuum. This resulted in 220 mg (96%) of product as a yellow solid.
- the resulting solution was stirred for 24 h at 40°C in an oil bath. The reaction progress was monitored by TLC/LCMS. The resulting mixture was concentrated under vacuum. The resulting solution was diluted with 20 mL of H 2 O, extracted with 3x20 mL of ethyl acetate and the organic layers combined. The resulting mixture was washed with 1x20 mL of hydrochloric acid (1 mol/L) and 3x20 mL of brine. The mixture was dried over anhydrous sodium sulfate. The residue was applied onto a silica gel column and eluted with ethyl acetate/petroleum ether (1:20-1:1).
- the resulting solution was stirred overnight at 28°C.
- the resulting solution was diluted with 60 mL of ethyl acetate.
- the resulting mixture was washed with 1x20 mL of 10% sodium bicarbonate and 1x20 mL of brine.
- the mixture was dried over sodium sulfate and concentrated under vacuum.
- the residue was applied onto a silica gel column and eluted with ethyl acetate/petroleum ether (1:1). This resulted in 140 mg (64%) of product as brown oil.
- Example 21 4-((3-((4-(piperidin-1-yl)-2-((1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-yl)carbamoyl)phenyl)carbamoyl)benzyl)thio)benzoic acid.
- Into a round bottom flask was placed a solution of intermediate 21a (0.0580 mmol, 1 equiv), 4-mercaptobenzoic acid (11 mg, 0.0696 mmol, 1.2 equiv), potassium carbonate (24 mg, 3 equiv), and DMF (1 mL). The solution was stirred at room temperature overnight.
- Example 22 N1-methyl-N1-(2-morpholinoethyl)-N3-(2-((1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-yl)carbamoyl)thiophen-3-yl)isophthalamide.
- aniline 22b 10 mg
- 3-(methyl(2-morpholinoethyl)carbamoyl)benzoic acid 1e 9 mg
- the solution was warmed to room temperature, and stirred for 30 min, and then diluted with dichloromethane.
- the resulting solution was washed with 5% hydrochloric acid, an aqueous solution of NaHCO 3 , and H 2 O, then dried over sodium sulfate. The solvent was removed and the crude product was used directly in the next step.
- Example 24 2-(3-((3-((4-chloro-2-((1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-yl)-carbamoyl)phenyl)carbamoyl)benzyl)thio)phenyl)acetic acid.
- a solution of intermediate 24a 195 mg
- DMF dimethyl methoxyethyl
- potassium carbonate 152 mg
- (3-mercaptophenyl)acetic acid 68 mg
- Example 25 1-(3-((4-chloro-2-((1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-yl)-carbamoyl)phenyl)carbamoyl)phenyl)-1-oxo-5,8,11-trioxa-2-azatetradecan-14-oic acid.
- Into a round bottom flask was placed a solution of intermediate 25c (96 mg) in dichloromethane (0.5 mL). To this was added trifluoroacetic acid (0.5 mL). The solution was stirred for 30 min, and then diluted with dichloromethane.
- HEK293 cells were obtained from the American Type Culture collection and propagated per their instructions.
- Expression clones for rat and human NaP2b (SLC34A2) were obtained from Open Biosystems (Catalog numbers MRN1768-9510282, and MHS1010-99823026, respectively).
- the sequence of the human protein was mutated to insert a threonine after residue 37, and to introduce a N39D mutation.
- choline uptake buffer 14 mM Tris, 137 mM choline chloride, 5.4 mM KCl, 2.8 mM CaCl 2 , 1.2 mM MgSO 4 , 100 uM KH 2 PO 4 , 1 mg/mL Bovine Serum Albumin, pH 7.4.
- choline uptake buffer or sodium uptake buffer (14 mM Tris, 137 mM sodium chloride, 5.4 mM KCl, 2.8 mM CaCl 2 , 1.2 mM MgSO 4 , 100 uM KH 2 PO 4 , PiT-silencing agent, 1 mg/mL Bovine Serum Albumin, pH 7.4) containing 6-9 uCi/mL 33 P orthophosphoric acid (Perkin Elmer) and test compound. Each compound was tested at twelve concentrations ranging from 0.1 nM to 30 uM. Assays were run in duplicate.
- pIC50 the negative log of the IC50 values of the test compounds were calculated using GraphPad Prism. Preliminary studies showed that under these conditions, sodium-dependent Pi uptake was linear for at least 30 min and tolerated 0.6 % (v/v) DMSO without deleterious effects.
- Sprague-Dawley rats Male, 7-week-old Sprague-Dawley rats (Charles-River laboratories international, Hollister, CA) were allowed to acclimatize for a minimum of 3 days before switching to a synthetic low-phosphorus diet (TD.85010, Harlan Teklad, Madison, WI) which contains 0.1% phosphorus and 0.6% calcium.
- TD.85010 Harlan Teklad, Madison, WI
- testing compounds or vehicle alone were orally administered at the indicated dose in a volume of 5 ml/kg, followed by a bolus gavage of monobasic sodium phosphate (1 mmol in 1 ml) 15 min after compound dosing.
- Serum was collected via retroorbital bleeding 30 min post phosphate bolus and phosphate levels were determined utilizing an ACE ALERA blood chemistry analyzer (Alfa Wassermann Diagnostic Technologies, West Caldwell, NJ).
- mice Male, 7-week-old Sprague-Dawley rats (Charles-River laboratories international, Hollister, CA) were allowed to acclimate for a minimum of 3 days. The experiment was initiated by switching animals to a synthetic diet (0.6% phosphorus and 0.6% calcium, Harlan Teklad TD.84122) for four days. After this time, the animals were placed into metabolic cages for daily monitoring of food and water consumption, as well as urine and fecal collections. Test compounds were incorporated into the powdered diet listed above containing 3% chocolate flavoring (w/w, BioServ #7345) at 1.3 mg test compound per gram of diet to achieve an average daily nominal dose of 100 mg/kg/day.
- a synthetic diet (0.6% phosphorus and 0.6% calcium, Harlan Teklad TD.84122
- Test compounds were incorporated into the powdered diet listed above containing 3% chocolate flavoring (w/w, BioServ #7345) at 1.3 mg test compound per gram of diet to achieve an average daily nominal
- Urine samples were collected in three daily periods from 24-48, 48-72, and 72-96 hours of drug dosing. Averaging these three 24 h periods allows for the more representative measurements of urination, fecal excretion, food consumption and water uptake for each animal. Phosphorous levels in the urine were determined by anion exchange chromatography using a Dionex ICS-3000 ion chromatography system. Urine samples were diluted 1:500 or 1:1000 and injected onto an IonPac AS18 analytical column (2 x 250 mm) using a potassium hydroxide eluent.
- Test compounds were incubated at 1-20 ⁇ M in simulated gastric fluid (SGF; standard USP solution with 3 mg/mL pepsin) or simulated intestinal fluid (SIF; standard USP solution with 3 mg/mL pancreatin) for 3 hr or 6 hr.
- SGF gastric fluid
- SIF simulated intestinal fluid
- Sprague-Dawley rats were orally gavaged with test article at a nominal dose of 2.5 or 10 mg/kg and blood was collected at 0.5, 1, 2 and 4 h.
- Blood samples were processed to plasma using K 2 EDTA as an anticoaglulant.
- Plasma samples were treated with acetonitrile containing an internal standard, precipitated proteins removed by centrifugation. Supernatants were analyzed by LC-MS/MS and compound concentrations were determined by interpolated from a standard curve prepared in plasma.
- Table 6 illustrates data from the pharmacokinetic profiling of selected example compounds. All compounds were orally dosed at the dosage shown, and pharmacokinetic parameters determined.
- test compound level in feces after oral gavage was performed using the same set of animals used to determine test compound concentration in plasma (Example 30). The animals were kept in metabolic cages and feces were collected from the time of dosing until 48 hr after dosing. Upon collection, feces was dried by lyophilization and ground to a visually homogenous powder. Duplicate samples of ground feces from each individual animal were weighed out and extracted using organic solvent. Extracted samples were then diluted into mobile phase and test compound levels were quantitatively determined by LC-MS/MS analysis as described in "Example 30" except that the standard curve was prepared in a feces matrix.
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Claims (19)
- Composé ayant la structure (I) suivante :
dans lequel :X est un aryle substitué ou hétéroaryle substitué ;Y est un halogène, alkylamino éventuellement substitué, alcoxy éventuellement substitué, thioalkyle éventuellement substitué, cycloalkyle éventuellement substitué, hétérocyclyle éventuellement substitué, aryle éventuellement substitué, -O(cycloalkyle éventuellement substitué), -O(hétérocyclyle éventuellement substitué) ou -O(aryle éventuellement substitué) ; etR1 est un aryle éventuellement substitué ou hétéroaryle éventuellement substitué,dans lequel le promédicament est sélectionné par les dérivés acétate, formiate et benzoate des dérivés alcool ou amide des groupes fonctionnels amine. - Composé des revendications 1 ou 2 dans lequel X est -ZR2, Z étant un aryle ou hétéroaryle et R2 étantt un substituant qui n'est pas de l'hydrogène.
- Composé de la revendication 3 dans lequel Z est un aryle, de préférence phényle.
- Composé de la revendication 3 dans lequel Z est un hétéroaryle, de préférence pyridinyle.
- Composé de n'importe lesquelles des revendications 3 à 7 dans lequel R2 est :(a) -CH2S(O)0-2(alkyl en C1-6 éventuellement substitué)C(=O)NR6R3,(b) -CH2S(O)0-2(alkyl en C1-6 éventuellement substitué)NR6R3,(c) -CH2S(O)0-2(alkyl en C1-6 éventuellement substitué)C(=O)OR4,(d) -CH2S(O)0-2(alkyl en C1-6 éventuellement substitué)OR4,(e) -CH2S(O)0-2(alkyl en C1-6 éventuellement substitué)R5,(f) -CH2S(O)0-2R5,(g) -CH2S(O)0-2NR6R3,(h) -CH2S(O)0-2(CH2CH2O)xR4,(i) -CH2NR6(CH2CH2O)xR4,(j) -C(=O)NR6(alkyl en C1-6 éventuellement substitué)C(=O)NR6R3,(k) -C(=O)NR6(alkyl en C1-6 éventuellement substitué)NR6R3,(l) -C(=O)NR6(alkyl en C1-6 éventuellement substitué)C(=O)OR4,(m) -C(=O)NR6(alkyl en C1-6 éventuellement substitué)OR4,(n) -C(=O)NR6(alkyl en C1-6 éventuellement substitué)R5, ou(o) -C(=O)NR6(CH2CH2O)xR4;dans lequel
R3 est un hydrogène, hydroxyle, alcoxy, alkyle en C1-6 éventuellement substitué, aryle éventuellement substitué, hétérocyclyle éventuellement substitué ou hétéroaryle éventuellement substitué ;
R4 est un hydrogène, alkyle en C1-6 éventuellement substitué, aryle éventuellement substitué, hétérocyclyle éventuellement substitué ou hétéroaryle éventuellement substitué ;
R5 est un aryle éventuellement substitué, hétérocyclyle éventuellement substitué ou hétéroaryle éventuellement substitué ;
R6 est un hydrogène ou un alkyle en C1-6 éventuellement substitué ; et
x est un entier de 2 à 10. - Composé de n'importe lesquelles des revendications 1 à 9 dans lequel R1 est un aryle éventuellement substitué, de préférence phényle, ou phényle substitué, en particulier trifluorométhylphényle.
- Composition pharmaceutique comprenant un composé de n'importe lesquelles des revendications 1 à 10, ou un stéréoisomère, un sel pharmaceutiquement acceptable ou un promédicament de celui-ci, et un véhicule, diluant, ou excipient, pharmaceutiquement acceptable, le promédicament étant sélectionné parmi les dérivés acétate, formiate et benzoate des dérivés alcool ou amide des groupes fonctionnels amine.
- Composition pharmaceutique de la revendication 11, comprenant en outre un ou plusieurs agents biologiquement actifs supplémentaires.
- Composition pharmaceutique de la revendication 12, dans lequel l'agent biologiquement actif supplémentaire est sélectionné parmi la vitamine D2 (ergocalciférol), la vitamine D3 (cholécalciférol), la vitamine D active (calcitriol) et les analogues de vitamine D active (par exemple doxercalciférol, paricalcitol).
- Composition pharmaceutique de la revendication 12, dans lequel l'agent biologiquement actif supplémentaire est un liant phosphate, et le composé n'interfère pas avec le liant phosphate.
- Composition pharmaceutique de la revendication 14, dans lequel le liant phosphate est sélectionné dans le groupe constitué par Renvela, Renagel, Fosrenol, du carbonate de calcium, de l'acétate de calcium (par exemple Phoslo), MCI-196, Zerenex™, Fermagate, APS1585, SBR-759 et PA-21.
- Composition pharmaceutique de la revendication 11, dans lequel le composé est substantiellement actif en tant qu'inhibiteur du co-transport Na/phosphate et le co-transport Na/phosphate est médié par NaPi2b.
- Composé de n'importe lesquelles des revendications 1 à 10 ou composition pharmaceutique de la revendication 11 pour utilisation dans l'inhibition du transport du phosphate chez un mammifère.
- Composé pour utilisation de la revendication 17, pour utilisation dans l'inhibition de l'absorption du phosphate médiée par le sodium ou pour utilisation afin de :(a) traiter l'hyperphosphatémie ;(b) traiter une maladie rénale, de préférence une maladie rénale chronique ou une maladie rénale à un stade terminal ;(c) retarder le moment d'entrée en dialyse ;(d) atténuer la calcification vasculaire localisée dans l'intima ;(e) diminuer l'effet hyperphosphatémiant de la vitamine D active ;(f) diminuer les taux de FGF23 ;(g) atténuer l'hyperparathyroïdie ;(h) améliorer la dysfonction endothéliale induite par le phosphate sérique post-prandial ;(i) diminuer le phosphore urinaire ;(j) normaliser les taux de phosphore dans le sérum ;(k) traiter la protéinurie ; et(l) diminuer les taux ou les concentrations de phosphate et de PTH dans le sérum.
- Composé de n'importe lesquelles des revendications 1 à 10 ou composition pharmaceutique de la revendication 11 pour utilisation dans le traitement de l'hyperphosphatémie chez un mammifère qui en a besoin.
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US36212110P | 2010-07-07 | 2010-07-07 | |
PCT/US2011/043261 WO2012006473A1 (fr) | 2010-07-07 | 2011-07-07 | Composés et procédés pour l'inhibition du transport de phosphate |
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CN109223724A (zh) | 2009-07-21 | 2019-01-18 | 凯克斯生物制药公司 | 柠檬酸铁剂型 |
JP5823514B2 (ja) | 2010-07-07 | 2015-11-25 | アーデリクス,インコーポレーテッド | リン酸輸送を阻害する化合物及び方法 |
WO2012006474A2 (fr) | 2010-07-07 | 2012-01-12 | Ardelyx, Inc. | Composés et procédés pour l'inhibition du transport de phosphate |
JP5827328B2 (ja) | 2010-07-07 | 2015-12-02 | アーデリクス,インコーポレーテッド | リン酸輸送を阻害する化合物及び方法 |
JP5827326B2 (ja) | 2010-07-07 | 2015-12-02 | アーデリクス,インコーポレーテッド | リン酸輸送を阻害する化合物及び方法 |
EP2772490B1 (fr) | 2011-10-27 | 2016-04-06 | Astellas Pharma Inc. | Dérivé de n-thiényl benzamide substitué avec un aminoalkyle |
WO2013129435A1 (fr) * | 2012-02-28 | 2013-09-06 | 協和発酵キリン株式会社 | Dérivé de thiophène fusionné |
WO2014003153A1 (fr) * | 2012-06-28 | 2014-01-03 | 協和発酵キリン株式会社 | Composé amide substitué |
HUE044550T2 (hu) | 2013-04-12 | 2019-11-28 | Ardelyx Inc | NHE-3 megkötõ vegyületek és foszfát transzport gátlási módszerek |
WO2015064532A1 (fr) * | 2013-10-30 | 2015-05-07 | 第一三共株式会社 | Composé de morpholine |
EP3747432A1 (fr) * | 2013-11-04 | 2020-12-09 | Keryx Biopharmaceuticals, Inc. | Citrate ferrique pour réduire l'insuffisance cardiaque chez des patients souffrant d'une maladie rénale chronique |
CN103755695B (zh) * | 2013-12-20 | 2016-04-06 | 陕西理工学院 | 一种具有抗肿瘤活性的酰胺类化合物及其应用 |
WO2015108038A1 (fr) * | 2014-01-17 | 2015-07-23 | 第一三共株式会社 | Composé d'éthylène glycol |
TWI647222B (zh) | 2014-03-06 | 2019-01-11 | 德商拜耳作物科學股份有限公司 | 作為殺蟲劑之雜環化合物 |
DE102014019388A1 (de) * | 2014-12-29 | 2016-06-30 | Susanne Wagner | Arzneimittel auf der Basis von Maghämit zur gleichzeitigen Reduzierung der gastrointestinalen Natriumresorption und Phosphatresorption |
EP3429693B1 (fr) | 2016-03-15 | 2023-08-23 | Mersana Therapeutics, Inc. | Conjugués anticorps-médicament ciblant napi2b et leurs procédés d'utilisation |
JOP20190080A1 (ar) | 2016-10-14 | 2019-04-11 | Bayer Pharma AG | مركبات مشتقة من 6-(1h-بيرازول-1-يل) بيريميدين-4- أمين مستبدل واستخداماتها |
CN110267944B (zh) | 2017-01-09 | 2024-03-08 | 阿德利克斯股份有限公司 | 可用于治疗胃肠道病症的化合物 |
JP2020505333A (ja) | 2017-01-09 | 2020-02-20 | アルデリックス, インコーポレイテッド | Nhe媒介性アンチポートの阻害薬 |
EP3685166A2 (fr) | 2017-09-20 | 2020-07-29 | Mersana Therapeutics, Inc. | Compositions et méthodes pour prédire la réponse à une thérapie ciblant napi2b |
JP2021534188A (ja) | 2018-08-17 | 2021-12-09 | メルサナ セラピューティクス インコーポレイテッド | NaPi2bに標的指向されたポリマー抗体−薬物コンジュゲートおよびその使用方法 |
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AP9801302A0 (en) | 1997-07-23 | 2000-01-23 | Pfizer | Indole compounds as anti-inflammatory/analgesic agents.. |
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AU3213200A (en) | 1999-01-21 | 2000-08-07 | Board Of Regents, The University Of Texas System | Inhibitors of intestinal apical membrane na/phosphate co-transportation |
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EP1817287B1 (fr) | 2004-11-24 | 2010-02-10 | Eli Lilly And Company | Derives d'ethers aromatiques utiles comme inhibiteurs de la thrombine |
JP5823514B2 (ja) | 2010-07-07 | 2015-11-25 | アーデリクス,インコーポレーテッド | リン酸輸送を阻害する化合物及び方法 |
WO2012006474A2 (fr) | 2010-07-07 | 2012-01-12 | Ardelyx, Inc. | Composés et procédés pour l'inhibition du transport de phosphate |
JP5827326B2 (ja) | 2010-07-07 | 2015-12-02 | アーデリクス,インコーポレーテッド | リン酸輸送を阻害する化合物及び方法 |
EP2591354B1 (fr) | 2010-07-07 | 2016-09-07 | Ardelyx, Inc. | Composés et procédés pour l'inhibition du transport de phosphate |
JP5827328B2 (ja) | 2010-07-07 | 2015-12-02 | アーデリクス,インコーポレーテッド | リン酸輸送を阻害する化合物及び方法 |
CA2880432C (fr) | 2012-08-21 | 2023-03-14 | Ardelyx, Inc. | Composes et procedes destines a inhiber un antiport medie par nhe dans le traitement des troubles associes a une retention de fluide ou a une surcharge de sel et des troubles du t ractus gastro-intestinal |
CN104902930A (zh) | 2012-08-21 | 2015-09-09 | 阿德利克斯公司 | 在治疗与液体潴留或盐分过载相关的疾病和胃肠道疾病中用于抑制nhe-介导的反向转运的化合物和方法 |
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